On my son's firebird, we bought a fan box for a "heater only" car and cobbled together an "adaptor" to mate it to the firewall. Believe it or not, it doesn't look all that bad (imho).
If you're not looking for something necessarily "show quality," it wasn't too hard.
I can't figure out how to attach a picture, but if you want one I can email it to you.
All articles which coruscate with resplendence are not necessarily auriferous.