SD - Ta - that's the idea I think. I don't need the new widget to be wireless. It could wired from the router into the printer usb. The Epson one is over £100. I wonder whether that HP one would work with my Epson printer, but it says it does everything - and bi-directionally ie printing and scanning.
For the other Qs - No the printer does not have ethernet, the router does not have usb. As I said, I don't want to use the printer via the desktop. As for the wirelss printer option, I have been looking at that - it would be the pukka solution but not cheap, and I have a good printer already.