Sorry for a completely off-topic request. I really don't feel too bad about it, as I am certainly not the ONLY one who does this from time to time :-) :-). Anyway, believe it or not, I have a very appropriate need to perform a new installation of a 1A2 Key system. Yes, in 2013, I have discovered that there is still, possibly a need for such a thing!! I have the telephone sets, but an lacking the KSU. A "shoebox" type would be sufficient (being only 4 lines worth of cards), but I would really prefer an entire "shelf" of card slots, and a separate power supply/ring generator so that I can activate all 5 of the buttons on the phones. Does anyone have one of these hanging around, or maybe know someone that does? Thanks... P.S. If you are not a "phone"-ey type of person, and don't know what any of this is, sorry for bothering you with this. Frankly, you are probably one of the lucky ones :-) :-). Jim WB6NIL