This might be the answer...
Diamonite begins Tu-134 conversion on behalf of Russian oil giant
May 14, 2001:
UK-based commercial aircraft interiors specialist Diamonite has begun work on its biggest conversion project to date – its 43rd for the Russian market.
If you Google for Tu-134 and Kemble you should find the link to Business Air News which has the article in full. It's an ex-Malev 134.