Where to buy Sig 552 magzines?

Evening folks. Been trying to find some nice SIG 552 Magazines for my cousin. His went wonky. Only ones i could find where on velocity arms. $23.95 for plastic ones ><

I was wondering if anyone knows where to get some. Have been also keeping an eye out for metal ones, no luck so far. Do they even make metal 552 magazines?

Thanks

I'm not 100% sure, but I think that real steel SIG55X mags are plastic. So AS plastic imitations are that much more realistic.
I have a bunch of MAG sig mags:
http://shop.ehobbyasia.com/magazines/aeg-std-magazines/mag/mag-100rd-magazine-for-sig-series-2pcs.html
They've done pretty well for me, but definitley require the occasional drop of silicon to prevent the BBs from binding.

Awesome, thank you. Those look very promising.