Need a second EVO 48V charger

#1
Need a second EVO 48V charger, and $125 to $150 seems a bit much. Anyone know of any good hacks I can do such as a 48V charging system from ebay coupled with the spare battery charger cable that came with the bike? $50 to $75 seems reasonable. I have two EVO's now and want to sell one, but I want the capability of charging my battery at work if I turn the remaining EVO 27.5 into a commuter.