La Belle projector woes...

I have noticed some discussion in this forum concerning projectors, so I hope this will be the proper place for my question.

I have a LaBelle 35mm slide projector (LaBelle 55, s/n G-8357)with one of the convex lenses broken. I would like to source a replacement lens for the projector. Suggestions, or would someone on this forum have parts for same?

Thanks,

David.