A complete coincidence, today I've been looking for fertilizer, especially Chempak 2.
I couldn't find it in any of the 4 GCs I tried. Only one GC had any Chempak stuff at all.
Ended up buying Miracal-Gro "All Purpose soluble plant food" 24-8-16 (+boron, copper, iron, manganese ,molybdenum & zinc) £3.49 for 1Kg