From GpsWiki

Accessories

We all love to accessorize, so here is a list (probably a never ending list) of what is available. If you have it, list it here. Please list, with pics, any accessory (we'll try and keep in it alphabetical order) including but not limited to, Screen Protectors, SD Cards, Cases, RAM Mounts etc. There is a page of sellers here.

Cases

Delorme provided case. This case fits the PN-20/40 like a glove and has a couple of side pockets for extra batteries. There is also a swivel belt clip mount on the back which works great and hold the PN-xx perfectly.

The GPS Outfitters Ultimate GPS Bag accommodates the PN-20/40, with additional space for accessories & supplies.

The LowePro Rezo 50 may accommodate the PN-20/40; in limited testing, it was a snug fit to get the zipper closed. This bag is designed for compact cameras, and features a Velrco & snap closure for the belt loop, allowing it to slip over a belt or backpack strap without disconnecting the buckle.