Back in 1986 there was a magazine called Telescope Making, in Edition number 26 there was an article on "An Equatorial Split-Ring Telescope" which has a great description on how to go about designing and building such a telescope. As one point the author, Joe Pearson, had made his plans for this mount available to ATM's. It is an easy build

and there are several ways in which the mount can be driven. The easiest would be the same way that the drive is constructed on an equatorial platform. Not that hard to do.