Can anyone recommend a Speaker Dock for a Sony Walkman MP3?

I have a Sony Walkman NWZA816 4GB MP3 player and wanted to buy a speaker dock. The only one I’ve found so far is the CPF-NW001, at over £150.00, and I’m looking for something under £100.00.

Can anyone out there help?????????
I’m looking for something that docks directly, not via USB or any other cable…..