Citroen Berlingo Rear Wiper motor Replacement?

I have same problem. 02 Berlingo m/space forte
Rear wiper stopped working. I cannot see that you can put 3 bolts and nuts in place of the rivets, so think that new rivets only method, but where do you get big rivet gun from and how much are they?
Please let me know how you solve this problem asap
as I am not confident at all on this job.
Citroen say new wiper unit approx £120
plus any other wrk eg if wiring or interface unit also faulty.

Steve
April 2010

just bolt it in with some M6 bolts and uts with washers

justin
January 2009