Is There A Way To Acquire ReQuip XL Medication At A Less Cost Or Switch To Another Medicine Which Is More Pocket Friendly?

I tke 2 12mg REquip XR tabs a day for late stage PD symptoms. The price is ridiculously high for brand (allergic to generic), I have orig. Medicare + Part B and D insurances. How or where can I buy 3 month supply under $4000+? Thank you! ps I also take stalevo 50, AZILECT 1MG, AMITRIPTYLINE 10MG. LINZESS 145 MCG, LINZESS 145MCG ,