"Torch & File" (an offshoot of Strawberry Bicycles) offers a sharpening service. I've not used them, but if Andy Newlands and Mark DiNucci are involved, it's got to be a good sign:

https://www.torchandfile.com/tool-sh...g-service.html

I seem to recall Franklin Frames offered sharpening services as well, but their web site isn't loading.