Currently I have found two companies that either specifically make dry-tooling holds for indoor-walls or say that their holds work for dry-tooling. Morganics & MRClimbing are the two I have found. Are there any others that people know of?

I made my own holds for my attic wally by drilling out stones that I found near construction sites.

Unfortunately I pulled a couple of tendons practicing on it, so I am currently laid up, but I bet they would work for dry tools.

There was a gym that held an indoor dry tool comp a while back in monument. I think all of those holds were drytool specific. I would contact them to see if they share the same brands as you have already.
I would like to know as well. My home wall is taking a beating from dry tooling.

hey Alex, check out Globeclimbing.com
they have two sets of "ice" holds that look pretty nice.

oh and while I was in Ouray, there was a guy displaying his fake ice setup. instead of using foam it was some sort of soft plastic. (sort of looked/ felt like LOTS of shoogoo. I got their card to pass on to you. you can actualy swing into it like ice, althoug it felt pretty hard that day due to the cold. In a gym it might work nicely.