Question about porting LoadVirtualdubplugin

[xekon]

I am needing to do some color correcting, when I was still using Avisynth I used Gradation Curves virtualdub plugin and loaded it directly in my Avisynth script so that I could pass it to x264 for encoding http://forum.doom9.org/showthread.php?t=133191

I loaded the virtualdub plugin using LoadVirtualdubplugin

so I am wondering the quickest/easiest approach to getting Gradation Curves loaded in Vapoursynth.

would it be easier to port the code for LoadVirtualdubplugin to a Vapoursynth equivalent? is that even possible?

or would it be easier to port/create a way to use Gradation Curves from scratch with a new Vapoursynth function/plugin just for Gradation Curves.

I am hoping somebody familiar with porting could point me in the right direction, I am not even sure where the source code for LoadVirtualdubplugin resides.