A bit cheaper than http://entourageedge.eu/catalog/accessories.html is this store: http://www.ereaderstore.nl They also have sites in other European countries and they can be found here as well
http://www.ebookreaderdiscounter.com...ntourage-edge/

Just ordered a 3 stylus package, a battery, a sleeve and the usb-ethernet adapter. They all appear to be in stock.

Mellon