There are alotta small products they could make that would go cheap enough many hams would bite on them.

Something like the Signalink USB. That would be a big seller
Small 300W tuners with dual needle meters
Small wattmeters
Interfaces for Solid state rigs to Older Power amps (Soft keys)
Antenna Analyzers

Basically, re-engineering most of the stuff MFJ makes and undercutting there prices in kit form. MFJ is basically a kit anyway. The first thing U need to do is TAKE IT APART and re-solder all the poor solder joints, solder slops and shorts! TERRIBLE Soldering at MFJ!