I don't think any of the LA resurrection ones are all that great, although i think the colours are more natural in this one than the one YMG posted, and the candid hair faffing nature of it is quite nice.
A Schnorbitz lookalike with companions from the Frankie Howerd show in '69, no exact date.
From left, Louise, Andi, Penny (replacing Ruth in this series), (Dilys Watling), Babs, Dee Dee, Flick..
From IMDB, looks like it's episode 2, broadcast 16th August.
BTW, saw in one of the Colby/Ramble interviews on this site that Frankie Howerd filming began on 24th June 1969, which gives us an idea of when Ruth's leave of absence was.
Looks like there was a two-month absence of Pan's People from Top of the Pops around this time (3rd July then 11th September according to Vin's list), so I guess if Penny appeared on Top of the Pops, it will have just been one edition.