rolleiflex "T" lightmeter refurbishing

[tak_61]

I'm trying to refurbish a Rolleiflex T and I have a big problem with the plastic cover of the lightmeter.The selenium cell is ok I guess, and it gives out about 0.3 V when hit by a dim light.The problem is in the lightmeter dial. The trasparent part is broken and the black one is seriously damaged. The mechanical part ( ev values dial and asa-din dial) seem to work, some doubt on the galvanometer (black arrow) because it is full of plastic debries, dust, and so on.
Does anybody have a link to a CLEAR diagram of the lightmeter and an idea were to find the plasic cover (tryed on e-bay but no results)
Thank you very much,
Stefano from Verona Italy

[JanBoettcher]

An untested source:
http://www.collectcamera.com/products/object_details.php?object_ID=2826&ocat_ID=81&lang=eng&pos=0&act=search&search=ra2826

In case you go for it, let us know about the results (hmmm for 65,-Euro ... I think I could help too ;-)