Page 87 of the same one I linked to. The lift assembly is one of the few things that didn't change (AFAIK) at 60k.
You're exactly right about TRF not listing a lot of parts in their "catalogs" (which for the TR3 are really more like popular parts listings, not a comprehensive catalog at all). However, they want to sell you a paper reprint rather than give away a PDF. Years ago, Charles promised to do a full TR3 catalog (similar to the blue & green TR6 catalogs) but never did. And at this point, I think it unlikely that he ever will. They don't even pass out the TR6 catalogs any more.