Looks like I have found someone with a spare b20 sump. Just got to organise getting it.
Havent been to northern wreckers for about a year now but pretty sure they dont have any 1 series cars anymore. Gone are the good old days.
Could i make a sheet metal sump? Sure. Id probably just make it from scratch. I have plenty of b230 sumps and even a complete b30 but i think more hassle than its worth to hack up a dirty thin stock pan.
At the end of the day a b20 sump works and saves me hours of fucking around. Im trying to actually finally finish the car haha its already been over 10 years...