They are going to cost about $6.80 each (excluing adapters) plus shipping over here with some other stuff I am buying, so hopefully they will work out cheaply.
I use the MNV2 needle valve and have had it around 15 months - was sent free by Clippard. It would seem that they are getting fed up with people phoning up wantng to buy one little valve - hence the £25 min order they now do.
I am getting them, its jus a case of seeing who wants them as a few on another forum I go on want some as well an asking the nice person to buy an send them
ps, I seem to remember they are the ones Tom uses