I have an ARO VHO ballast for sale. Details:
Electronic VHO ballast
powers up to 440 watts
max. 16' of T12 VHO lamp
Input: 120V, 60Hz
operates 2, 3 and 4 lamps
Model: VHO Florescent
High performance, Energy Efficient
Asking $40
I bought this from Shane and Belinda a couple months ago intending to use it on my system, but I decided to go a different direction.
-Dan