I read somewhere that these will take standard KJW P226 / 229 mags too. Now, I thought I read somewhere that the new generation KJW P226 could fit a TM mag also. I'm wondering if these Sig-branded models are like that as well.
As for price, I'm not sure how much they sell for in the US, but the KJW P226 is just over $100, if memory serves me correctly. I'm not sure how much more expensive the Sig brand one is, as I haven't seen it for sale on any sites yet (not that I've been looking). I'm not sure how much of a markup there'd be for the Canadian market.