The Machinist does have a v* scene in it... but it's mostly sound with little visual. All you see is the main character leaning over the toilet and you can hear it. It is very brief!

Fargo... I know at one point the pregnant cop lady (you'll know who she is) says "Oh I'm gonna puke." or something to that effect, but she doesn't. Other than that, I don't remember any v* in that one!

I haven't seen any of the other films... but hopefully this will help! Just look at it this way... v* scenes in movies are 100% SAFE exposure therapy! Good luck!