I know, the 3sdm's look awesome on Mike's LCR, but I wouldn't go that low because I hate with a passion that gap you get in the back of the arch towards the bumper!! I know you can get plates imported from the US that bring it back, the rear beam bolts on to them, with the shims bolting to where the beam would originally mount, but that means importing them, disassembling the brakes, lowering the beam, so for evry day use I'm just going to lower it on decent springs, instead of cheap coilovers. -40mm I'm planning, and eventually poly bush the beam but thats all experimenting at work.
All Golf mkIV seats fit I believe, the only thing that may need changing is the airbag plug, I had to solder the plug off my old seats onto the new ones. Not hard and 2 wires on each plug.
mkIV Golf/Bora seats, A3/S3, Toledo, I'm not sure but I think Fabia seats may fot also, as I've seen someone put Toledo half leather, the same as mine in a VRS, which would surely mean that some Polo seats would fit?
My seats are finally going to a good home, one of the trainees at work has got a hybrid built 20vt mkI golf that they are going in. I will post pics after xmas when they are in.