LOL! I never think about 223 in an AICS. Any time I see it, I think 7.62. Yeah, the have the 10rd AICS PMAG, but not a 5.

It does seem Accurate is the only supplier. I did find these, however, I have know information on function. For $37 might be worth a try for myself if I was on the road you are. But that is for you to decide.
https://mag3d.ca/product/aics-223-magazines/