I know where to get a Hi-Capa 7.1 Dragon. It's in Ontario.
However, I will warn you not to get it. I bought my Hi-Capa 4.3 from the same place, and I had to replace the crappy Cansoft frame TWICE. It is made of crappy tinted plastic which actually looks ok, but in terms of durability, I give it a 1. Lasted me maybe 4 mags before it cracked.
I don't think that you would want to ship it back and forth and back and forth replacing frame after frame.
Also, the price they have it for it quite high and I don't think it is really worth it.
Ares M110 LEAF - Ares Striker Tan
TM G17 Pink - KJW P226 TwoTone