Jerry mentioned trying to get a bracket for the Polemaster early on shortly after this mount's release. I'd say it is still far too early to see a new mount adapter specifically for this iEXOS-100. You can, however, mount your Polemaster on a Vixen dovetail bar. They make an adapter (or maybe it is ADM that makes it... can't remember for sure... but I know that High Point Scientific sells it) that mounts to the bottom side of the front of the dovetail bar. This is the route I intend to go when the winter/spring skies finally clear up in my neck of the woods. We had snow and high winds again last night and have had weeks of rain so it will be a month or so before I can begin some astronomy again. April is usually the earliest I can start up again but this spring has been miserable for clear skies. I'm hoping for sometime in May.
I can see how mounting on a hotshoe could be a problem. A hotshoe still allows some side to side wobble with anything mounted in it. Just a tiny amount of wobble would throw off alignment by tremendous amount... probably in the 15-20 degree range.
Explore Scientific iEXOS-100 and EXOS-2GT (non-PMC)
Explore Scientific ED 102mm Refractor