For those who don't know I had the second of two strokes about four years ago. I hope it will be the last

This has left the right leg weakend and the right arm almost totally paralised. I want to return modeling in a small way.
Do any of you know of a grip that will help me do this? I'm looking for something that will hold a peice steady while I glue it and present the other peice to it; not as easy as it sounds. I've looked and I can't find anything. Perhaps one of you knows someone in the same possition?