>>10690264So I looked at the goods.
The PSKX format is kinda queer, I had to use 3rd party script to bring it into 3DSMAX, but from then it was pretty easy: save as OBJ, open in Meshmixer, separate.
The RX78 model I chose to open readily separated into 153 parts which upon cursory examination appear to be the actual plamo kit parts (minus the sprues), so you could export them individually and print at your leisure (I guess if you tend to lose parts and happen to have a 3D printer you're safe now). The poly count is kinda low, so scaling it to really large size without additional work is probably not very feasible (I imagine a couple of iterations of Turbosmooth would help). So yeah, there's your downloadable gundams.