Take a look at the Grain35 package from CrumplePop.
It's $199 but you do get 12 Different 35mm and 16mm Film Stocks that were made by filming the film stock through a Kickstarter project, so it's the real deal.
I came across this post while googling the topic myself, is there a way to extract graphable data from those LUT files? I want to look at the curves in Mathematica or GNUplot.
Just get a copy of GIMP, save the GIMP format curves, and load them up. The intensity curve for the velvia one, for example, only seems to have 2 control points (plus the ends) so it should be easy to model.
In fact, if you save the file in the "old" gimp format, (which is a text file), the velvia one has these control points: