Injector and fuel system problems. Going to buy donor car

[Clio 1.5 dci]

I've got a MK2 DCI 80.
It's developed injector issues (STOP light appearing when putting foot down quickly when accelerating). My mechanic is asking me to pick up a cheap donor car so he can swap parts from it. He is also suspecting an electrical issue.
I am happy to pick up a donor car (my brother is in the car trade), but I want to know, because my car is a 80HP, will I be able to get away with a donor which is the 65HP or 100HP variant? Would they have the same injectors/electrical components?

 

[R3k1355]

Your mechanic wants an entire donor car to swap bits back and forth??

Sounds like your mechanic doesn't have a clue whats wrong.

 

[Scrooge]

Get the injectors refurb'd for ~£400 and change them yourself, takes less than a hour to do it correctly

 

[Clio 1.5 dci]

Might be an electrical problem though - he says, something to do with the relay I think.
But I can salvage a fuel pump and injectors from a car (and other bits) for less than the price of refurb'd injectors. There's always a risk that if I pick up the injectors and the problem persists I would've blown £400.

 

[Clio 1.5 dci]

Just picked up the car. Can anyone advise if they're different injectors in the 65bhp vs the 80bhp.
I know there's a difference in from dealers but this doesn't necessarily mean different part numbers.