^^ What Pippen saidI got mine at Pacific Angler....you may go direct to Islander or check your local tackle shops....OR Mike's as noted above. They don't seem like an odd item for shops to stock as Jason at Pac Angler said "you bet" when I called him to see if he had them.
I took my reels to Pacific Angler and Matt replaced them for me for ~$10 - quick swap of the springs and improvements are massive. My reels are the newer generation with the new handles but I still had issues with the line creep. No line creep since I replaced the springs and better drag control when fighting big fish.