I have been plugging in companies that sell miniatures, bits, bases, terrain, scenery into a massive spread sheet over the last number of years. It is incomplete, but someone may find a new sources. Currently there is 267 companies. C&C welcome.
https://drive.google.com/open?id=1LEo99ojB5Br8Hewn4lKgjCuS_qO80FQn9NWkX7A4sGE