I've been thinking bout this too. I figure if you can find a salvage car you can get the whole roof skin so the hole, the track and mounting are already done and you know it wont leak. you just have to weld that roof to your roof AND make it look good. that and wire it up. get the switch out of the donor car too. guess you could get one from scion tc, mercedes benz, G6, probably a couple others. that webasto one looks ghey with the front glass covering the hole.
94 V8 on 17" custom paint, R.I.P
97 Mark VIII LSC yeah
08 Ford Edge, white for now