Good Evening All-
Stich, I'm with BobHWD on this one... I gotta' believe there is a trashed Rolex in the world with an undamaged, functioning bracelet looking for a home. You might also have luck on eBay or with small, independent jewelers.
Think about the heartache that would be caused when your new Taiwanese P.O.S. replacement bracelet allows your vintage, family heirloom to unclasp, clatter across the pavement, and then finally be run-over by a passing Kenworth 18-wheeler. Crazier things have happened!
If you use the watch everyday, ensure that it gets cleaned, relubed, and resealed every five years or so. More often if used in saltwater environments or diving. If need for new parts is discovered during the check-up process, ensure the shop ALWAYS calls you first to arrange that you don't receive a "Frankenstein" of a watch upon return. A mechanical will last for GENERATIONS with proper care, without need for replacement parts.
Good luck on your search for a cost-effective bracelet. Please consider the long-term benefit of making an investment now.
~ Blue Jays ~