I have used:
http://www.millersound.net/indexfl.htm
I have only used his refoaming services, not reconing. I have been very happy with the results, even with a foam edged tweeter (I have also had him refoam some woofers). I found him by asking my brother who I should go with, and he said that the shop where he works uses Millersound for their refoaming needs. Bill LeGall (of Millersound) does a good job at a reasonable price in a reasonable amount of time.
If I needed another refoam, or a recone, I would have no hesitation with going with Millersound.
I am not affiliated with, nor do I profit from, Millersound.