Hi Gav,
First.....I know very little about steppers and drivers.
The 2" pillow block mount I'm still building has a Byers 359 tooth 10" gear. I ordered it with a stepper motor. I sent details of gear and stepper (which is a Hurst and the same as the Losmandy G 11) to AWR Tech in the UK.
Alan Buckman from AWR built the controller to work with the stepper I had.
The hand control is a stand alone box that has RA and Dec leads. The Dec works with a G 11 Hurst Stepper, same as the RA motor.
Alan has been around for a long time and has vast amounts of know how about telescope drives. The AWR controller I bought does what it's meant to do, and cost 190 UK Pounds. Send an email with details of what you have and want to do. I rang Alan too....very helpful gentleman
The Losmandy drives are for 360 teeth gears and are a 1:1...direct coupling thing.
Here is the AWR tech link
http://www.awrtech.co.uk/
Hope this is of some help to you...It was my solution to much the same problem you have. Electronics is another world to me
Matt