I am having difficulty finding a replacement left rear cone for a Shimano MC10 hub. I have struck out at two local bike shops (Southern NH) and online. The local shops are able to find something that looks similar, but the thread pitch is off. Per the Wheels Mfg chart, the axle is M10 x 9.5mm. I believe the Wheels Mfg part number is either R063 or R067.
Would someone recommend an online supplier or local shop (NH or MA) who has this part?