Well, in the interest of actually building some content, I'll post up what information I have:
The gloves available from Leathernext are very nice, but have some notable differences from the film-used gloves, such as the particular shape and texture of the knuckle carbon-fiber pads, the shape and placement of the finger vents, and the material for the thumb pad.
As it turns out, the finger vents (and probably knuckle plates) on the original gloves were taken from this glove:
Amazon.com: O´Neal Butch Carbon glove black: Automotive
I am in the process of modifying my Leathernext gloves to be more film accurate by swapping the vents and knuckles out. Pictures to come when I have that done.
In the meantime, I found that plastidip spray is a good solution for the thumb metacarpal pad.
Here is an image of the thumb pad after being roughed up with sandpaper and several light coats of plastidip:
WIP update: Here I sit with the O'Neal gloves, tearing apart this fresh, unused pair so I can use their parts for my frankenstein gloves. More pics to follow as I get the new parts mounted.
Side by side knuckle comparison:
After modifying the Leathernext Mk 2 gloves with the parts taken from the O'neal butch gloves, you can end up with this:
I am still trialling fixes for the stitching holes left by the previous finger vents, but they are pretty much invisible unless you are really close to the glove.