Be prepared to spend big $$$$ for that if you can find one. Occasionally on the equipment exchange. Zahal used to have them, out of stock for a long time. You could always wait and hope for one on a US auction and get it imported by IRUNGUNS by that's also going to cost extra. It looks like certain US sites have them in stock but they explicitly say no exports, I'm not sure if IRUNGUNS would be willing to talk to them and have them sell to IR in the US, then have them do the paperwork for you. ITAR is a massive pain in the ass.
Alternatively you can go down the rabbit hole of european surplus sites and try to find one, Canada has no import laws regarding gunparts aside from receivers, magazines, and prohib parts, and I doubt eastern european countries have something like ITAR.