Quantum Instruments: Turbo Z questions

I picked up two Quantum Instruments Turbo Z power packs, but they were missing the chargers. I don't know if the cells are good or not, but I can't count on them.

I believe this takes the QT52 / QT-52 charger.... Anyone have one to sell? (if so, please reply by PM)

How difficult is it to replace the cells?

Information on cell replacement at batteries + but not DIY. There are several DIY's on you tube though.