gerri:

I just tried a 2" wide nylon web belt through the newest of my Folstaf holsters and it and the slider went through fine.

If the Fishpond Waterdance utilizes standard nylon webbing and a quick disconnect clip I'm thinking it should go through the latest Folstaf holster just fine. The belt loop opening appears to be about 2-1/2" long X 3/4" wide.

You may want to take a change buying one from Fly Tyer's Carry All or maybe testing the fit at a fly shop near you that carries Folstaf and asking them to order you a holster.