Some still listed at the following (via their advert in Black and White Photography magazine):
http://www.secondhanddarkroom.co.uk

Have you tried a web search? These were found via google in under 2 minutes:
http://www.retrophotographic.com/shop/117/119/index.htm
http://www.morrisphoto.co.uk/Product...ctID~6652.html
http://www.novadarkroom.com/cat/119/...one_IV_RC.html