Just around the corner from my girlfriends house in Porthcawl, there is a new shop called 'Gloss Max'. Popped in today and they have a nice little selection of cleaning products. From Autoglym to Meguairs, inc Bilberry wheel cleaner in 5 ltr containers for £22!! Don't know if thats cheap. They also have all the Duragloss products! that i use and love and Bilt hammer snow-foam, TFR's, waffle weave towels, micro-fibre cloths, loads of different cutting compounds etc, etc. Apparently, they are getting some brand new products from America soon, so i will give these a try and see how they compare They are also selling the snow foam lance thingy that is very popular with detailers for £55, not sure of the name but it does work better than my karcher one.
If you are in the area its well worth a visit.