Are the VC12 tenders (such as with the C&O H4 2-6-6-2's) available for purchase?

Is there a designated Micro-Trains conversion for the heavy mountain?  This is a beautiful model, but the factory-installed couplers are ridiculously toy-like, and they're mounted way too low by NMRA standards, so they come uncoupled under any measurable draw weight.  I'm dyin' to get this baby converted so I can enjoy it's beauty!  Meantime, it's under glass.