Copay assistance for gallbladder cancer??

Does anyone know of an agency that offers copay assistance. There are plenty out there but believe it or not if you don't have a certain type of cancer you do not qualify. Gallbladder seems to be excluded everywhere I try. Her chemo copay for Xeloda is $525 for 3 weeks. With all of her appointments and procedures having copays also(as high as $200) the bills are mounting up. Please post if you are aware of any assistance.