Williams by Bachmann E7 shell in need of repair

A photo or 2 would be helpful; some cracks are so small that applying some plastic cement from the inside and rubber-banding the shell together for a couple of hours can do the job, and paint can be touched up with Hobby Lobby acrylics.

Regardless, try eBay for a new shell - or complete loco; prices can vary, and it may be worth it. The cracked shell or loco could become your or someone's project piece.

As I understand, Williams E-7's had a batch in the past that was a bit too narrow for the frame, or vice-versa, and the assemblers forced the issue, the constant stress of which caused cracking over time. 

Where is the location of this crack? It could be a godsend as the prr Tuscan units had only a single headlight. If the crack is in that area, sand down and fill in the lower headlight!