Is it possible to source only the cabinet boxes? I have a custom cabinet maker who will be doing a lot of the work on this job, but there are many areas (closet, pantry, etc) where I just need the box in a very specific size. Do you have a spec sheet or list for minimum & maximum sizes? For one of the built-ins, I’m looking for a box that is 32 1/2″ W x 102″ H x 7″ D. Is that possible? Also looking for custom sized roll-outs for other built-ins. Thanks!