MMM Nice ones on Ebay as well
http://cgi.ebay.de/BMW-R-100-GS-R100GS-Sonderumbau-HPN-Q-TECH-IMO_W0QQitemZ330281645437QQcmdZViewItem?hash=item330281645437&_trkparms=39%3A1|66%3A2|65%3A10|240%3A1318&_trksid=p3286.c0.m14
Item number 330281645437
Or a Basic mucho modified
http://cgi.ebay.de/BMW-G-S-1000-Roemer-HPN-Umbau-GS-fuer-die-grosse-Tour_W0QQitemZ270290838939QQcmdZViewItem?hash=item270290838939&_trkparms=39%3A1|66%3A2|65%3A1|240%3A1318&_trksid=p3286.c0.m14
270290838939
And if a bit of work don't worry you, I'd go for this monolever one
http://cgi.ebay.de/BMW-R-80-G-S-Paris-Dakar-schlechter-Zustand-1-Hand_W0QQitemZ130264719234QQcmdZViewItem?hash=item130264719234&_trkparms=39%3A1|66%3A2|65%3A1|240%3A1318&_trksid=p3286.c0.m14
130264719234
A great project here, potential to make 3 bikes :O
http://cgi.ebay.de/Motorrad-BMW-R100G-S-mit-Zubehoer-Ersatzteilen-HPN-WP_W0QQitemZ250312104429QQcmdZViewItem?hash=item250312104429&_trkparms=39%3A1|66%3A2|65%3A10|240%3A1318&_trksid=p3286.c0.m14
250312104429
Rough translation>>
Time and space to sell: BMW R80 (100) G / S 1984 and Spare Parts / Accessories.
Squashed under the steering head, before ca: 6000km Total revised engine 1000RS Mahle pistons and cylinder heads unleaded R80, camshaft torque deeper, double ignition Q-Tech, longer 5Gang, clutch pressure spring 1000, forks WP-entered Ölinsfederbein, Underfluhrauspuffanlage chrome steel, newly galvanized and painted frame with ID exists Jg.1980, versch.Heckvarianten, 2xDackar 1er seats, seat abgepolstert, original seat, 42Liter HPN tank, 32Liter P / D tank, 20Liter tank, additional headlights, Bosch, carburetors and heads 1000ccm, div.Koffern, two engines, three gearboxes, motors, wheels and original 19 "with new wheels, with Doppelscheibenbremmse Stahlflex entered, two original forks, various small parts of three G / S, etc.