Good question. Willie sells enough of his excellent aluminum bottom metal to keep him making them.
Probably a smaller market for this part. It would be nice to have them available. Programming a CNC would take some doing but cheaper than setting up injection molding. Once set up, ejection molding would be cheaper per unit, just take a lot of units to cover start up costs. CNC would probably be the most reasonable choice for a smaller market. Not sure how Willie makes his.
