Body for vintage Kenner-inspired Gonk Droid Prototype kit. Available in all colors. You will also need a Gonk Prototype Sprue for the legs and antenna:
LINK. Kit fits together without glue, but I would recommend gluing the antenna in place. Finished Gonk is articulated at the legs. Provide your own sticker to finish it off!
PRHI Gonk Prototype Leg Sprue listing:
https://www.shapeways.com/product/R4DCCGEZV/prhi-star-wars-kenner-style-gonk-prototype-sprue