I just got back from a motel with a 20/503, memory back up battery finally bit the dust. The system is still bopping along just fine. No way will you get a motel to cough up the thousands of dollars for a upgrade. TechHarry is right, get their confidence, they convince them you can get a new system in quicker than you can find the replacement parts (providing the don't pull some old system and ask if these parts work).
Carl, next time just solder in sockets, then it's $2.00 a RatShack for the drivers.
