I E-mailed Tetenak UK and asked about this thread. I received the answer today as follows-- :lol:

Dear Mr Lewis,

Thank you for your recent email regarding the availability of Neofin Blue and Neofin Red developers.

Neofin Red developer was discontinued over a year ago but Neofin Blue is still available. The article number for Neofin Blue is 100126.

Kind regards,

Geoff Giles
Technical Administrator