Where can I get a board for my strengthmaster treadmill? ?

Duh wasnt it strong enough? Sorry.
I would suggest rather than paying a fortune for a new part, As all it is, is a support for the belt, some good quality ply wood would do the job, Available from all good builders merchants etc, cut to size. make sure you round the edges with sand paper, probably find the origonal is made of plastic, or MDF. Ply much stronger. last a lot longer.

SD
August 2011