These guys keep spamming me with offers that look quite good:
(PAINS WESSEX Coastal Flare Pack @ £59.99 inc)
Marine Safety Equipment & Supplies
37 Newcombe Rd Southampton SO15 2FT
TELEPHONE SALES: 02380 238 048
(Although they don't seem to have a web site
- and they seem quite happy to despatch flares by post
I can forward a copy of latest email if any help.