Got some pix of the bikes you're missing. Hope it helps in your search.
JJ04-18-21 Barfly
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2004%20release%20F/IMG_9520.jpg

JJ04-18-23 El Duce
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2004%20release%20F/IMG_9592-1.jpg

JJ05-18-17 Diablo Softtail
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2005%20release%20E/IMG_9550.jpg

JJ05-18-18 Dominator
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2005%20release%20E/IMG_9577.jpg

JJ05-18-19 El Duce
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2005%20release%20E/IMG_9534.jpg

JJ05-18-20 Penny Saved
http://i5.photobucket.com/albums/y192/ECchopper/West%20Coast%20Choppers/the%20bikes/one%20eighteenth%20scale/2005%20release%20E/IMG_9566.jpg

Did you also need 05-18-13 thru 16?
Got 'em if ya need 'em. Let me know.