Those plugs are a pain in the ass to obtain... acura/honda will only sell them in a set of 5 plugs with pigtails, and it costs around $130... so this isn;t that bad of a deal... for the record here is how I got around using those plugs:
Go to a junk yard, cut off an ecu harness with the plug that plugs into the ecu...
Break the plug open and get as many skinny femail leads as you can... next, take the female and slide it on the ballast's male plug
Add a drop or two of solder, then cover each individual female with heat shrink, now you have two wires coming out of the ballast plug, I next use big heat shrink to cover the entire plug housing and shrink it down to the two wires... lastly, use a zip tie to clasp the big heat shrink around the two wires coming out... just extra insurence against moisture getting in there...
Of course, I thik you;d have to be a total retard to plug those cables into your stock harness, ALWAYS USE A RELAY FOR HID LIGHTING! the amperage draw during ignition WILL fry your stock harness... and you'd be out a ton of cash... if you need help making a hanress, or want to flat out buy one, send me a pm
Lates!