Peter,
I got my backpack from the USA seller on ebay,RO-MAN supplied the filter system(200 gpd).
The pole I use is just the unger 30' ali pole(this came from wintecs),its a real light easy to use pole, as long as you only use the first three sections(18' enough for most domestic work) its a bit of a beast to use with sections 4&5,so ifyou do alot of work over 20' I'd get a lighter stronger pole.
With just a few other bits like water butt ,25litre containers,brush,hose and various fittings it all came to about £500. The best £500 I've ever spent,wish I had found out about WFP a few more years ago!
Tim