use ebay? My set of extra longs ran me $180. The ratcheting wrenches are garbage. They have length but the little reverse levers break quite often, often enough that SO sells them seperate. Buy GW or used Matco Pro Swings and save yourself a boat load of cash there.
On an aside the OEXLM710 [non-B] are slightly thicker along the beam and as a result more comfortable if you can find them.