http://www.racetep.com/ztripdcoe.html#twmtbod
Ive seen them on z forums before.
http://www.twminduction.com/Throttle...dy2900-FR.html
twm has some too
I think inglese may do something similar too, some people use individual throttle bodies and get the same look. Overseas use bike throttle bodies in a side draft form on smaller engines.