Did you build these yourself or buy them built and flashed?

I'm converting a defender with a model 3 motor and volvo xc40 pack, I have a some parts left over from the xc40 which i am keen to know if they are useable
brake booster 32333276 i'm using a gen2 i booster in my build but i would like to know if this is useable to someone else
Also the OBC 32383807 ...

@johnlr keen to hear if you made any more progress as it has been some time since your last post.