Try Home Depot.

I have chicken wire and 3" roll insulation in one (it works good if ya hang stuff on your walls). The second has 3" PSK style (non chicken wire, has reenforcement built in) it cleans up easy. Both building are commercial style steel frame with r panel sheets. I have seen the spray on insulation, Everyone I have talked to loves it you can paint it or just leave it pale yellow. watch out and make sure the spray type is non flamable some are, some are'nt.

A buddy of mine had the spray in type. When they fired up the wood burner in the winter it was a nice place to work.