Replying to Salomon STH2 16 AFD Swap Question

Hoping to get some clarification - cheers in advance!

I just snagged a pair of 4frnt Renegades second hand (stoked) and they came with sth2’s with the WTR afd. I’m planing to run my alpine boots with gripwalk soles with these skis and the internet provides zero help when trying to locate and buy MNC afd’s for Salomon bindings.

It’s obvious that the sth binding ended up being compatible with the MNC norm, but I’m trying to figure out if they can be swapped and then where one can buy them.