This is what Dynon told me also.
They said that they may produce their own module to provide the transponder with an approved WAAS GPS source, or they might configure another vendor's product to use with Skyview.
Part of the issue is seeing what the FAA might do : stand firm, offer flexibility, add/change rule etc…whilst this development continues. Making it cost effective for cost conscious sport pilots is important too.
I'm impressed with Dynon and I fully expect them to solve the problem before too long.