Do you have a budget in mind? It'd go a long way to narrow down what fits
If you're OK going used, that might be a good approach. If you find a MK that's well cared for, there's no reason you won't get many years of service from it. It could be a bit tough, but it's a way to get a MK for less.
If you're looking for new, have a look at Mass Drop or keep an eye out for good sales (assuming you got the time to wait). Otherwise, I think all you can do is look at alternative switches. Since the Cherry patents have expired, there have been a few Cherry-like switches come along. Take a look at keyboards with Kailh, Gateron, or Greetech switches (www.mechanicalkeyboards.com
carries these). I don't have any personal experience with these ones in particular so I can't say much on how they are personally. Best of luck with your search!