Curious why you would need to swap out a capacitor in an almost new radio? Cap replacement is usually something that happens after 30 or 40 years when the old ones start to dry out......... If you are having issues with a 955HPC+ it is VERY unlikely to be a capacitor issue.
In answer to your question: Never seen a schematic or a parts list for either radio and I'm fairly certain they don't exist in the wild.
It's a common practice for removing money from the radio owners wallets........I notice some shops replace the larger caps in the radios with different brand. Some say Chemi-Con capacitors aren't that good.
Not something I would worry about. The chances of some other component failing first are pretty good............I notice some shops replace the larger caps in the radios with different brand. Some say Chemi-Con capacitors aren't that good.