I don't know about the universal pouch, but tuff-as nuts (nutshell) down in New Zealand makes very nice leather pouches for iphones and other items wearing just about any case available.
I don't know how much money you want to spend or how fancy you want to get, but you might want to check with them. They cost will be between 60.00 and 100.00 USD plus shipping. Yes, they're expensive, but they will also last a lifetime. The same pouch can fit different phone/case combinations too.
