I wonder if normal (FDM) 3D-printed foosball figures are really going to survive much intensive playing. They need to take a lickin' and keep on kickin' - and it seems they're more likely to fall apart at the seams. The reason you're replacing them is likely because the injection-molded original parts failed already, and injection-molded parts are a lot tougher than FDM 3D printed ones. You might want to look into more resilient materials and processes, like semi-flexible plastics and multi-jet printing.