Well I'm not 100% on your 463, but I dare say Cat used the same design for all their scrapers?
Check out this video I made of a 637 getting some new roller rails. The cross members and supports should all be the same, no diff or engine of course though. Twins and singles (and I assume tow behinds) are all pretty much the same, only difference is twins have another engine sitting on the frame in the back, but I'm fairly certain they even use the same frame.
YouTube - 637E Scraper Repairs
If you really need it I can get some pictures of everything inside the bowl, but I won't be around until the 5th (going home for the holidays). I think Alex (Burnout) is home for the holidays too, otherwise I'm sure he would too.