They haven't stopped using light piping as SkyShadow mentioned, it's pretty common, it's use is either a budget decision, or maybe a design decision.
I personally think some figures look better without it and there are times when having a big clear back of the head makes it look like their brain module is exposed.
Other figures of course really do benefit from it. It works much better on display cabinets that have some sort of side or back lighting.
have you considered a hobby shop, perhaps hobbyco or that art supplies shop that is in a lot of shopping centres. I'm not sure what the material on not menasaurs feet is but perhaps even a fine grit sandpaper would work.