Buying Camping Equipment

I am looking to buy a tent and camping equipment for a trip down to Patagonia. However, I haven't a clue as to where to start looking as I haven't seen many outdoors/camping shops in Buenos Aires. Does anyone know of any?

Any info would be much appreciated.
I"m sure there are more places..but I happen to be in the JUMBO this weekend and saw an aisle or two with camping stuff....
Jumbo on Av. Bullrich