Here's an extract from the Marshall Ward mail order catalogue 1978/79 Autumn/Winter.
I've a vague memory of having the R2D2 bubble bath from here and also an R2D2 soap on a rope from somewhere else.
It's remarkable that there seem to be quite a few of the soaps who escaped the bath and survived until today.
I came across a few which were sold on eBay this year. One set of C3PO and R2D2 with boxes sold for just £5 and another sold for £19.
Curiously, the second one was re-listed on eBay by another seller using the same photos and currently live with a buy it now price of £27.99.