OTNY and Sportmask are now one company, so maybe he could get access to them? Also, I'm not sure that any Sportmask cage would fit without drilling new holes or having some fit issues, though as we saw the current CCM cages (which look similar to some Protechsport cages) fit on the Sportmask Mage.
I haven't made my final decision yet if I'll go with a Sportmask cage or a standard one, I'm sure I'll enjoy the mask either way. I'm just waiting for him to receive my mold so that I can see what size window he can fit on their (I prefer as large as possible), then decide on the cage.