Most of the Chinese Microscope manufacturers have the same
measurement as Meji. Check the GemOro Microscope for Jewelers. You
may be able to buy the stand with the Gem Clip, Dark field
Including both the lamps upper & lower.
All you need is to find the dia for the head. I know they use to
have the same. Should cost around $250.00. It could be better if you
post the measurement of the Meji you have.
Regards
Kenneth Singh
Karat46@aol.com
46 Jewelry Supply Inc
46 West 46 St, NY NY 10036