Buying dive gear in Cozumel?

[ColoDale]

I have used Scuba Repair, Prodive, Aqua Pro and Studio Blue if I am trying to find something here. These places generally have inventory. The last three are within about a half a block for each other downtown.
Honestly I did look look in the past for a small pouch with a zipper on the top and didn't find what I liked.
I did finally use an old tank band weight pouch of mine but lost it as I had not put on a keeper.

I would ask around at these shops as somebody (a DM?) has an obsolete/broken BCD that had tank pouches though offhand I don't know of anyone.
If you get truly desperate, you can try Dive Rite in Playa del Carmen. Their pouches are in different sizes, generally larger and are pricey. I have had them DHL things to me after I paid via card but then I have dealt with them before and I have time for shipping. YMMV.
I would assume that level of desperation means weight belt first.

 

[JFS]

Just undo the straps on your cam band and install the weights there.

 

[scorpiofish]

Deep Exposure is your best bet. There is another retail store on Avenida 5 near the cemetary, Scuba Price Mexico.