Believe they stopped doing it in 2005/6…
A few other options are;
http://cgi.ebay.co.uk/1-x-250ml-Hi-Vis-Florescent-High-Safety-Marking-Paint-/290182273843?pt=UK_DIY_Material_Paint_Varnish_MJ&hash=item4390361b33#ht_638wt_1141
Diddys suggestion of the Testors is spot on – best orange I’ve found – you want the Pactra racing finish in fluor orange or yellow – watch out – its a solvent based one and you’ll be on the ceiling if you breathe a lot in.
One little trick I found recently is for reversible tip colors. Plastidip do fluorescent orange and yellow and normal black –and you can thin it 20% with their Shinecoat – F799(??). For plastic bristles you can coat them in about 20 minutes by dipping the tip and leaving upside down. Then, since its a rubber coating you can just peel the coating back off to go back to your original tip. Not tried it on laquered cane tips etc, but for plastics, it works a treat.
MS