Just in case anybody wants to do a full rewire of their car during a restoration, I found this on ebay Germany:
Interior through to trunk:
http://www.ebay.de/itm/BMW-E9-2800-...3.0+CS&hash=item4afc9c7cf3:g:ipQAAOSwGYVXBZB8
Engine bay/Front harness:
http://www.ebay.de/itm/BMW-E9-2800-...3.0+CS&hash=item58df9a0130:g:tIcAAOSwsN9XBYpg
As this thread ages, to help find it again, search for:
BMW E9 2800 CS 3,0 CSL CSi CS - Kabelbaum Hecksatz NEU
BMW E9 2800 CS 3,0 CSL CSi CS - Kabelbaum Frontsatz NEU
E9 Wiring Harness
Interior through to trunk:
http://www.ebay.de/itm/BMW-E9-2800-...3.0+CS&hash=item4afc9c7cf3:g:ipQAAOSwGYVXBZB8
Engine bay/Front harness:
http://www.ebay.de/itm/BMW-E9-2800-...3.0+CS&hash=item58df9a0130:g:tIcAAOSwsN9XBYpg
As this thread ages, to help find it again, search for:
BMW E9 2800 CS 3,0 CSL CSi CS - Kabelbaum Hecksatz NEU
BMW E9 2800 CS 3,0 CSL CSi CS - Kabelbaum Frontsatz NEU
E9 Wiring Harness