Zeiss Cell plate holder for Observer

Hi everyone, I am looking for a stage holder for an older Zeiss microscope. Does anyone know a good place for getting used scope parts?

Zeiss has sourced their stages from Marzhauser for as long as I can remember - but this wasn’t always the rule. Depending on the stage model you have - you can get these inserts directly or many times I have found stuff on eBay if you know the part number of the particular insert you need.