I am building this beast next. Does anybody have any sources for reference. I have found very little on the net, including Dome's home page.
http://farm4.static.flickr.com/3012/2862889481_d3477f04c9.jpg

You're right, not much out there. Here are at least some. Hope it helps a little.

At quick glance, the first link title says 1980, but it looks really similar to the 1979 car (second link).
http://www.dome.co.jp/museum/car_m/02_rl.html
http://www.dome.co.jp/museum/car_m/car_m06a.html

http://www.m-sugaya.com/racing/pics/dome.jpg

1979 Silverstone 6hr
http://www.brdcprints.co.uk/lowres/111/main/1/339462.jpg

Great build of a scale model version:
http://www5.ocn.ne.jp/~mokeden/sakuhin/dome2/dome2.htm (http://www5.ocn.ne.jp/%7Emokeden/sakuhin/dome2/dome2.htm)


They also have the RL-80 and RL-81 version available in scale model form, but I'm assuming you were looking for the 1979 version?
http://jp.autoblog.com/photos/1979-dome-zero-rl/ (Labeled 1979 but it looks like a 1980-1981 version)
http://www.dome.co.jp/museum/car_m/03_rl80.html
http://www.dome.co.jp/museum/car_m/04_rl81.html
http://www.dome.co.jp/museum/car_m/index.html