Hey Tony
firstly welcome to the forum.
Bintel sell the Orion steadypix-cost $99 last time I priced it.
It is not the same as the Scopetronix gizmo though.
Astronomy Online also sells some universal adapters but they are not cheap..you can see prices on the AO website
see John Hs post elsewhere where he talks about having to buy a piggyback adapter for his ETX 90 that cost $99. It appears that if they (the scope manufacturers) cant get you on the scope they nail you for sure on accessories
I am sure other people may have some suggestions for you as well..but you may find that unless you make your own it is going to be pricey.
Ving made his own and so did some others-there is a thread somewhere here as well