No, we don’t do that.
Mainly because it is a lot of work, time, and money. Also you have to verify a final product before releasing which is even more time, and money especially if something is wrong.
That said you should explore combos on this site more and try some of the others ideas. For example using the sidewalls and stacking. Careful placement of certain switches and jacks at the Top sidewall would afford more room below.
Wilkie1 and Playsforfun both have 1590DD enclosures with 8 -16 circuit boards inside.
For examples:
Check out this Combo Build Thread
also…
Wilkie1s Mega Combo Thread Link
I hope that helps.