If you ask someone nicely that already has a G3RCF chassis they could send you duplicate drawings. Than all that is needed is to buy a 3mm sheet of CF and start cutting. You will also have all the spares you need than. The other pieces of the chassis should still be available from Gorillamaxx or maybe mike could mill you off a duplicate or two. Besides the CF all the alloy needed is the front and rear skid and the X braces. As far as the spacers go you could buy some ally tube and drill, drill and tap where needed. There are only 12 of them. One length would do.
PM me for drawings
Here is my G3R build Thread
http://www.rc-monster.com/forum/showthread.php?t=22158