DV736 and DV62 Si at www.dynadirect.com
Sherwood RD7106 and DV62 CLR at www.aoknetinc.com
JBL PB12 at www.consumer-direct.com

And do you know some web site can buy b&w speaker?

Nope:( :( :(
I've looked everywhere and none of them carry B&W
I think it's because B&W speakers are considered higher end and those websites usually carry lower end speakers. The only higher end speakers they carry that I have seen are: AR, JBL, Infinity, Klipsch, Jamo, Psb, Wharfedale. So you have to go to those high-end stores in your area to listen to them.