I have a Beseler 67C condenser enlarger and I could never get it to print correctly. Then I noticed that it is missing one of the condenser lenses. I was wondering if the condenser lenses from other Beseler enlargers such as the Printmaker 67, VC 67 or such were interchangeable with my enlarger? I haven't been able to find the condenser lens by itself, but was thinking I could buy the enlarger head from one of these other models and use the lenses from them. Or if anyone here knows a source for these lenses? I could buy new, but don't want to spend $150 for this just this.