P&D in Edmonton usually has them in stock for around $55
Wolverine
Wanstalls
Frontier
Epps
Anywhere that sells the RFB should at least be able to get them.
The place I used to get them from in the States had their website down the last couple times I checked but had said they were going to set up a warehouse in BC to make export easier. Still no word on when though.
I spoke with Vault a few days ago, they have lots of the 5/5 and 5/20 DSA mags in stock, only problem is that the retailers are not stocking/ordering them, I phoned a few placed (in town/out town), nobody have stock?.. Not sure why?. But I think we all need to phone the dealers and ask for FAL metric mags....maybe this way, they will place an order with Vault?.
How does one purchase these mags and how much are they?