Finding Rare Vinyl

I'm wondering if anyone knows of a good service for finding hard to find vinyl. I'm fortunate in that I travel for work, so have made friends with many local shop owners and have a sort of network of eyes that can find things for me. But... I'm looking for something that was produced in a very small number and not even that long ago. It's just that sought after. Anybody know of someone good at finding that rare gem or very limited item?

Thanks in advance.