Does anyone know where to buy 4" thick foam for sleeping? I bought one last year near Kundu but now I can't find the place again. Thanks.

explorerred,
There is a very small shop at the Er-yi-er Da/Lonquan Lu road junction, between bus stops xiao cai yuan li jiao qiao and xiao cai yuan 小菜园立交桥 -- 小菜园 bus route 10 (and others). Get off at the highway junction 小菜园立交桥, and walk over the single railway track in the direction of Carafoure Supermarket, on the same side of the road as Carafoure. It is in the row of small shops under the flyover. They have lots of different thicknesses of foam, and they have single and double bed size. They don't speak English, but like most shopkeepers, they don't like to turn away a sale! If you ask, they will roll up the mattress and tie it, so it fits into a taxi. Hope my directions help you find the place. Happy sleeping.