The motos donated the "A" shape parts for the feet and some other misc. parts. The 1/35 Tamiya Gepard donated the leg joint hubs, main chin laser,  and other misc. parts. The sphere was one of those gashapon - vending machine - type balls. The main body was built up from putty as far as I know.

I never started the build but spent A LOT of time researching the parts.