Digital BW, The Print

You may want to read through the following links:

http://www.silverprint.co.uk/bwf2.html#SCALA
http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=007Ful

If you go to the homepage of the first link, and then click on the 
chemicals link on the left side, you'll find that they still offer 
kits for some reversal process. Haven't used any of it, but thought 
it was worth saving.

You might also try a search for "Scala" in this group.