Nick,
Your 801 sounds very strong for a 350-watt motor... but perhaps only because the belt is worn out like you're saying? If it had a new belt (#1043260001), it would sound slower than how I'm hearing it in that video you made.
A new brush roll for your 801 is, again, part #2059721000.
I wanted to tell you that the cord on your machine is a replacement, as it's off-white in color. That color of cord was used on models 992, 993 and 9000 produced in the 1988-89 production season.
~Ben