Theres no need to go that far. You can always make your own adapter for the highend charger. All you really need is a strand of black wire and a strand of red wire, and the alternate plug that you need. Then you can just clip the aligator clips onto the ends of the wire. Just make sure they don't touch each other. Or if your not used to making things up like that, most LHS have Tamiya style plugs and Deans style plugs with wire already attached, ready to buy. Pick one of those up, clip the aligator leads to the ends of the correct wires(keep them seperated at all cost) and charge away.
You could also look at some high end chargers that have replaceable leads. My charger and the ones its just like(ApexSigna/Integy 16x3) have replaceable leads right at the charger itself. The GM VIS Commander also has this feature. Some Orion chargers also have replaceable leads at the charger, but I don't know if Orion has stepped up to NiMH compatibility yet. I know there are others out there that have replaceable leads at the chargers.
Either way you choose to go, believe me, your not stuck having to get two chargers.