Technobeam Repair help Please!

I have recently purchased 2 old technos, Lightwave Research technos, and have to replace some broken parts. Do the parts listed for the newer style Technos fit the older models as well? Specifically, I need to replace an effects wheel, Lens, and lens tube top cover, and the part number for the old one says:
80190047 Wheel, Effects (no glass) With Retainer Springs
and the newer replacement parts site only sells this:


80190073 WHEEL,EFFECTS METAL BASE ASSY W/OUT GLASS $188.72

I noted the difference in part numbers, and am wondering if they are the same part, and whether I should be looking somewhere specific for parts for the older model. Anywhere that sells parts that is less expensive? Also looking at the online manual for the technos, my menu options are not the same as the manual listed, anyone have an older version, or a place I can locate one?

I appreciate any help I can get, thank you for your time!
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