source for microscope parts?

[Allison]

Dr Engelbert Buxbaum wrote:
> Am 03.11.2008, 15:58 Uhr, schrieb Allison <allison from nospam.com>:
> 
>> We have a Leitz Diavert microscope that is in good working condition 
>> except for the fact that it is missing a phase ring.  Unfortunately, 
>> the microscope was bought in the 80's and is obsolete as far as Leica 
>> is concerned....so the part number for the phase ring is no longer in 
>> their system.  Does anyone know of a good source to get parts for an 
>> old microscope?
> 
> Since you do not say where you are this answer has to be broad: 
> Microscopic Societies often have ways for selling and buying microscope 
> parts, like ads in their journals or web pages. Especially for high 
> value brands like Leitz and Zeiss you can get spare parts this way for 
> many decades. There are also companies that specialise in used lab 
> equipment. And of course a simple web-search for the part number may 
> always turn up something.

FWIW, I'm in Canada so I figure a Canadian or American source would be 
the easiest for me.  (I tried a web search for the part number with no 
luck, probably because the microscope was bought in pre-Web days!) I am 
inquiring at used lab equipment sites but so far no luck there either.