While the other suggestions are quite sharp they are not appropriate for a pipers uniform. My band just switched to horse hair sporrans which as you know no pockets. I bought the bands pouch wallets from the Celtic Piper. $21 for the small and $30 for the large. It slips right over your belt and you can slide it around to your back while playing to keep it out of the way. I think this is what your looking for:

http://www.celticpiper.com/accessori...s.html#nowhere