I have the 3D printer, but I have no design skills. My attempts at recreating something at Minimate scale was a disaster.
Aside from an 8 inch MInimate just for kicks, I would love to have the design for some of the larger Minimate pieces (hulk hands, hulkbuster armor pieces, etc.) to be able to print them at a slightly larger scale to fit on 2.5 inch and 3 inch Minimate bodies. Hulkbuster should be close to 13 feet tall, which should be closer to 4 inches, or the bulked up pieces on a 3 inch body. Same for Hulk on 2.5 inch body.
But, yes, sadly there are not a lot of folks out there creating accessories for Minimates in the 3D realm