Hi Nick,
try this info from a thread on page 2 of the Equipment Discussions section:
http://www.iceinspace.com.au/forum/s...ad.php?t=36229
This is the item I believe you need. It's called an "Equatorial Platform" and is for exactly what you want to do. This one is much cheaper than others we've seen too, - as I believe someone mentions in the thread.
Cheers
