Unless your doc who works for WC will right name brand only/dipsense as written, there isn't much you can do. It seems strange you can't use use a different location at Right aid. My wife worked for them and they use local distributers for C-11's and they can request a specific brand, whether or not that local wholesaler has another brand is out of everyones control if the doc won't write dispense as written for name brand. You may just have a turd for a pharmy that won't take that extra step and follow through to see what they can do for ya. I would be sure your dealing with the PIC, the pharamcist in charge. It's their licence on the line for that pharamcy and a good one will take the extra step and at least check and see if it's possible.
Good luck, Dave