Reply to DIY enclosures

i am getting very interested in a wide variety of music oriented electronics projects (i.e. monome, midibox). my one issue in costs is the high cost of enclosures and panels (having them engraved). So, i was wondering if there are any effective DIY solutions to creating enclosures and panels for such projects
cause it would be badass to put a midibox SID in an NES case

thanks