Hello Pieter,
sorry for my late reaction.
I cannot sell my Uliboard; I still need it myself.
I am happy to make any plotfiles (HPGL, Postscript, DXF) you need,
and also can make high-res TIFF files out of the generated Gerber files.
Please send me a PM with your email address
With cordial greetings to you,
Steven Postma