Do you still have it? Were you able to find a 155?
If you found/find a replacement board, I might be willing to take the 158 off your hands. Then, everybody's happy!
To clarify, this board was sold a while ago. Sorry for not updating, I kinda lost track of internet ego after I got my new NS board. Sorry to leave anyone hanging. Shredder's gotta do what a shredder's gotta do.