>>I should have been more clear. I already have the stamp postcards and
>>am looking for the art-exhibition ones. I've seen those on eBay only
>>once, and unfortunately I didn't get my bid in before they closed.
>
> There's a set of four from 1982 on eBay at present, I don't know if
> these are the ones you're after or not:
>
> http://search.ebay.co.uk/_W0QQsassZjasonmunn

Yes, those are exactly the ones I missed out on previously.

Many, many thanks!

Elizabeth