Joe, Do you remember I once told you that IBM carries parts WELL past the date of marketing withdrawal.?? There is an 800 number to call to get prices AND parts identifaction. There is a FEE for the parts identification but the price quote and availability info is free. Write this # down..you may need it some day. 800-388-7080. If you call it and select parts pricing for PN 2305616 you will find that it has been assigned a new PN 2462593 and it costs $18.75. You can also order directly through this number. This does NOT work for PC parts (only real machines!!). Pick a part number off of your 5100 and see if it is still in the sysem (probably not) John P.S. there is an ex IBM'r in north Jersey who formed his own company to do nothing but repair series/1's years ago. His name was Al Horton and his company was called....are you ready for this.....Series/1. I don't have his # but your friend can try the phonebook.