Part number on the faulty ballast is D-36-22.2-3, which does not
correspond with any of the ballasts in the OMT parts list. Mark
I'll assume as soon as you install a new bulb, it flashes once then is
dead? That is the normal symptom of a bad ballast.
You should be able to find one in any hardware or lighting store. Check
the bulb for it's Watt rating and get a ballast to go with it. Put in a
new starter at the same time. Should cost $5 to $10.