As I said, I scratch built mine. The Motor / Gearboxes were not specific to any car, but are available to body builders for wiper set ups, swing doors and windows etc. These motor/gearboxes were not cheap, but I wanted new as I didn't want to have to re-visit them once fitted. I modified some original window regulators and had some gears cut to suit this and my new drives.
I spent several days at different wreakers looking at what was fitted to other cars and how the worked etc. None I saw used limit switches, some had clutches and some just stalled the motor, draw your own conclusion from that. None I felt would 'adapt' well or easily in to a mini.
Here are the kits that I found (but I felt wouldn't look any good in a mini)
http://www.stagecopenrith.com/elecwindows.htm
and
http://reviews.ebay.com.au/How-to-insta ... 0001314857
Keep in mind that the system must be 100% reliable as it is an important part of the security and weatherproofing of your mini.
I have some pics (somewhere), but this is all I can lay my hands on ATM
By gtmowog