Just found this deal on eBay. The machine seems a bit old but I believe is always usable. Unlucky i don't know the german so cannot say what's there's written in the auction:

Siebdruck Handdrucktisch bei eBay.de: Druckmaschinen Plotter (endet 21.02.08 09:37:56 MEZ)

Bye bye,
Fabio