There's no magic, unfortunately. Keep searching the 'bay for any of the appropriate ones: 7205 (rivet), 7835 (folded), or 78350 (solid). Get a sniping service to hide your interest. There are a few sellers in Singapore and the UK whom I've had good luck with. I've won nice examples of each for $275-350. Anything under $400 is a solid deal. End links are a tough subject, even on gen watches (generally don't fit well from the factory) so I don't get too hung up on those. In fact, I buy gen ones for a deal when I find them, but also buy aftermarket ones and mangle them to suit my purposes as necessary. On this 7205, the 57 ends have the perfect "funky fit" for the era.
One other area where I've done well on my 20mm bracelets is buying pieces and assembling them. I have a few clasps, and have bought links separately. Like the end links, a worn gen bracelet gives the right patina and glow to a rep that might otherwise look too sharp and shiny. Plus, as a guy who wears gen a fair amount of the time, the aftermarket just can't replicate crowns, coronets, or bracelets that well.