Hey Dave, I had commented before on your Youtube channel about ordering carpet from Stock Interiors. I finally finished my floor and got it installed today. The fit is decent, and didn't take much trimming. A tiny bit around the back "shelf," around the door sills, and a little bit around the heater box.
http://i13.photobucket.com/albums/a2..._125058955.jpg
Oh, and I picked up a Hawkbill/Linoleum knife for trimming the carpet. It made trimming the carpet a breeze. Much easier then shears or a regular carpet knife.
If your still deciding, I'd suggest the Stock Interiors.