The bolts were std 10mm bolts with the heads machined down to half the thickness to stop them catching on the rear hub when its bolted back up (handy having a father in law whos an engineer and has a lathe to use on the quiet.....

)
Funniest thing for me today was laying under the car connecting the handbrake cable with that poxy pin and when I reamurged it was pissing down......lol............. Luckily only for a minute or so
As for cost I recon you could do it with all new parts (professionally refurbed calipers) for about £250 inc buying old calipers for exchanging for refurbed 1's (will need some shagged calipers for the hanging brackets and for the exchange on the refurbed calipers, I got some rear calipers and hanger form a scrappy for £30 in working order)
Steve