I guess it depends on what you're looking for. I like triples, so that pretty much rules out nearly all current groupsets (Shimano, Microshift, and Gevenalle are options, I suppose), but I also want silver components so most current groups were already ruled out anyway.
What I typically do instead is piece things together based on modern, but not the latest, stuff on eBay. If you're patient, you can put together a nice 10-speed group cheaper than you'd have gotten from a UK discounter a few years ago. If you are willing to spend lots of money you can get nearly anything you want in NOS condition. Sometimes, if you're just lucky, you can even get NOS cheap. Here's what I managed for my Stella:
(No pics of these Potenza brakes in the box, but they were bought new from Universal Cycles.)
(Took my cleanest shifters off of another bike.)
All of that, plus a new 10-speed chain set me back $364.