Bastion and fortress near Nether 0, 0
Java Edition 26.3. Checked with Seeder's engine on .
The Nether is as important as the Overworld in a run. Trade with the piglins for ender pearls. Fight the blazes to loot blaze rods at the fortress.
Build your portal near 0, 0 in the Overworld and you'll arrive near 0, 0 in the Nether, where every distance on this page starts. The bastion type is listed on every result.

1 From Nether 0, 0: a bastion (treasure room) 102 blocks north-east and a nether fortress 48 blocks east.
Seed191758851545931
What X, Z Distance BastionTreasure room 64, -80 102 blocks Fortress 48, 0 48 blocks Overworld spawn at 0, 0.

2 From Nether 0, 0: a bastion (hoglin stables) 101 blocks north and a nether fortress 45 blocks south-east.
Seed206213312664520
What X, Z Distance BastionHoglin stables 32, -96 101 blocks Fortress 32, 32 45 blocks Overworld spawn at 0, 48.

3 From Nether 0, 0: a bastion (bridge) 68 blocks south-east and a nether fortress 86 blocks north.
Seed161492380098657
What X, Z Distance BastionBridge 48, 48 68 blocks Fortress 32, -80 86 blocks Overworld spawn at 0, 0.

4 From Nether 0, 0: a bastion (housing units) 36 blocks south-east and a nether fortress 125 blocks north-east.
Seed54021399797083
What X, Z Distance BastionHousing units 16, 32 36 blocks Fortress 80, -96 125 blocks Overworld spawn at -16, -16.

5 From Nether 0, 0: a bastion (housing units) 80 blocks west and a nether fortress 86 blocks north.
Seed149453541694791
What X, Z Distance BastionHousing units -80, 0 80 blocks Fortress 32, -80 86 blocks Overworld spawn at -96, -64.

6 From Nether 0, 0: a bastion (treasure room) 128 blocks north and a nether fortress 36 blocks south-east.
Seed280694549017343
What X, Z Distance BastionTreasure room 0, -128 128 blocks Fortress 16, 32 36 blocks Overworld spawn at 0, 16.

7 From Nether 0, 0: a bastion (housing units) 86 blocks west and a nether fortress 86 blocks north.
Seed240005838359373
What X, Z Distance BastionHousing units -80, 32 86 blocks Fortress 32, -80 86 blocks Overworld spawn at 0, 0.

8 From Nether 0, 0: a bastion (housing units) right there and a nether fortress 160 blocks north-east.
Seed138797839164044
What X, Z Distance BastionHousing units 16, 16 23 blocks Fortress 128, -96 160 blocks Overworld spawn at 0, 0.

9 From Nether 0, 0: a bastion (treasure room) 32 blocks east and a nether fortress 161 blocks north.
Seed220111307474418
What X, Z Distance BastionTreasure room 32, 0 32 blocks Fortress 16, -160 161 blocks Overworld spawn at 0, 0.

10 From Nether 0, 0: a bastion (treasure room) 179 blocks north-west and a nether fortress right there.
Seed256836257451805
What X, Z Distance BastionTreasure room -80, -160 179 blocks Fortress 16, 0 16 blocks Overworld spawn at 256, -48.
Need more?
These ten seeds are the best out of thousands I searched. Seeder can find as many as you like, given the right premises, with your own range and in your favourite version.
Search in the finderGood to know
- Wear at least one piece of gold armour so piglins will mistake you for one of their own and not attack you.
Questions
What is a bastion?
A huge ruined castle in the Nether, full of piglins and gold. There are four types: housing units, hoglin stables, treasure room and bridge. Minecraft Wiki
What is a nether fortress?
A dark brick castle where blazes and wither skeletons can spawn. Minecraft Wiki