The kit I bought was an American International GM-K382. When I ordered the CD player they sent me a scosche kit but I really didn't like the looks of it. The main difference is the scosche uses a front mount system which means you slide the cd player in from the front and use the trim ring that comes with it. The American International is a rear mount kit which makes flush mounting look a lot better in my opinion. Especially because the CB doesn't come with a trim ring.
Most car audio shops around here had the kit in stock but if you can't find one you can order it from here:
http://www.sonicelectronix.com/item_...l+GM-K382.html
I was scared to use a cut off wheel or anything like that because I didn't want to cut too much off and wanted it to stay level. So I took my time and filed the sides down. It probably took me 30 minutes or so but I really am happy with the end result. In my pictures it kind looks out of place but in real life it almost looks factory.
By the way, how do you like your CB? How long is your antenna and what brand is it?