Heck knows about their availability, but look at the JIC-B
part for 1-gang page 2 at www.appletonelec.com/pdf/PB-2-3.pdf
Icecube’s chance in hell, but there’s also page 2+ www.appletonelec.com/pdf/SquareArmored.pdf 4SP Plenum Box 1-1/2" Deep, Drawn Without any holes and with reset knockouts — also 4SPD and 4SPJD
Another mutation is taking a case of 4S boxes to a sheetmetal shop and have them put a couple of spotwelds on each KO.
[This message has been edited by Bjarney (edited 10-26-2004).]