The paint cup at HF looks good...thanksi will probably go this route and use the paint cup with a 2 ton bottle jack off Craigslist:http://www.peachparts.com/Wikka/DieselInjectorTester
But NAPA has an M22 plug that can be tapped to 1/8" NPT and a fuel filter from a Rabbit can have the top cut off before you screw it on, with one of those nice can openers that cut the top ridge instead of the lid.