I've got a Wohlenberg Type 76 paper cutter that works fine, except for the touch screen. It's almost completely washed out. We have been getting by with experienced operators who just remember where to press for the basic functions. I need to get a new screen, the parts suppliers won't sell me the monitor alone, I have to buy the whole control unit. Would it be possible to install an aftermarket touch screen? If I do buy the whole unit, there are no certified techs in my area to ensure a proper installation. Any advice would be very appreciated.