need to order part quick. but where?

okay for the return oil line from the turbo on a TTi street kit, this 90 degree bend with a barb was provided. I tapped the pan but now the thread i used on the tap (18) doesn't match up with this provided peice. I Need to order a new one with the proper thread, anyone know where I can get this? the peice is 5/8 on both ends. this one provided is more like 20 or 22 threads per inch, i need an 18. the tap i used is out of my friends standard plumbing set. ive been to the local plumbing places and to every regular hardware store in a 30 mile circle. PLEASE!!!!! internet web sites with fast shipping welcome.
EDIT add: NPT (National Pipe Thread)
Jegs also has AN to NPT fittings... check them out.
Googled this:
http://www.spmed.com/SPresults2.asp?...AND%20ADAPTORS

