I am pretty sure that there are no prefab ones to be found. I have found a few places online that will make one with a 3 week lead time and whatever I want in finish (carpet, paint, carbon fiber, etc.) and cubic feet up to 1.5. I guess that they have trunk molds of the cars from doing one of these before. I was just going to see if there were any suggestions about good shops before I took a shot with an unknown.
My bad about the terminology if we need to argue over opinions and semantics. I thought for sure that when you have something made-for-you with choices of finish, size, wire location, etc. so that yours is unique (at least could be) that custom was the right term.
The only local shop in town that will make one wants $1000 (and up) with a W6 - they won't make one otherwise and I don't want a W6.