I've searched the archives and read plenty about that there exists an automatically self-adjusting orifice tube that will fit in the DeLorean when converting to R134a. (This is for a friend's DeLorean; not mine.) He has asked the vendors present at the Memphis show, and none of them sell this type orifice. Can anyone give a good enough description of this so that we can source it locally? If not, is there ANY place where we can find one? And while on the subject, can anyone say if the DeLorean OEM orifice is the same as a typical GM? I'm not after a "support your vendors" war. I just can't see paying $20+ for something that can be had for $3 locally. Walt