Tricky to call this one, I guess you can see the basic transformation in in a way, but then when the transformation is animated, its just all over the shop. After they get out the fish water, Hot Rod Transforms and his arms do a full 360 during change, but that's the only point where it does. IIRC, when he and daniel are racing to Auto city, his arms just fold in at the sides. Arcee certainly doesn't have a particular transformation design...
I think with perhaps a good enough budget for the toy, you could start at show characters and make them a toy. look at FE Bulkhead and Optimus. Both wonderful toys that would have been designed on the show first.