The sculpting sequence was not used because Graham Chapman gave an under par performance in it.
The "masturbating" comment in The Summarising Proust Competition was restored in the early '80s BBC repeats and indeed can be found uncut on the BBC's VHS releases. "Silly bunt" has yet to reappear.
The Political Choreography sequence was shown once then removed for the repeat showing as there was an election at the time and the clip depicted Ted Heath and Harold Wilson. After that it seemed to disappear, but did turn up on some US screenings in the late '70s so there's a good chance that will have been easy to find.
And finally, good news on the Satan animation. A colour tape of the uncut show was found just over a year ago. Indeed it was rescued at the last minute from an E-Bay auction and digitally copied by the BBC.
Perhaps this explains the delay in this series coming out in the UK. Hopefully they've been waiting until they could find all of the missing material.
Fingers crossed.