I had two shoes bags come with the bag (M&M read: POD) I use to carry my gear in. They seem to work fine.
I have a few shoe bags from Honig's and they work fine.
Honig's Whistle Stop - A22 - SHOE BAGS
Also, I have this shoe bag from Jim Evans and it's a good bag too.
Sport Shoe Bag ABUA Online Store
Good luck.