VHT, there's a reason that you've "found" a nice set of 14" wheels available. Just about everyone has learned, or is in the process of learning, that the availability of tires for wheels less than 16" has decreased drastically, and many tire sizes that were common over-the-counter purchases not very long ago are now "specialty" tires, only available from Corky Coker. The BFG P285/70R15's that have been a tire of choice for the back of highboy's are a perfect example. BFG stopped production due to low volume, Coker bought their molds, and he's now the only game in town for that size tire.
Your choices of tires for 14" wheels will only get worse as time goes on, not better, and pretty soon the only alternative will be to call Corky. Either look at some bigger wheels, or accept the supply alternative. Uncle Bob's advice to buy from Summit to save the shipping is good!