[macgyver]

http://www.dinosaurelectronics.com/

these are the guys.  call them and they will help you figure out what you need.  i replaced the boards in the propane furnaces in my 1990 with these.  

tom

Thanks for the info I emailed Dinosaur Electronics and they phoned me and offered to help troubleshoot the furnace problem, once I got set up on the work bench I called them back and must have spent 20 minutes with a volt meter trying to sort things out. It seems I have a faulty sail switch and circuit board ,they even gave me a contact in Calgary where I can get the parts !
That is fantastic customer service !!