For nylon or delin I don't think you need to make a new pivot. Just a nylon/delin bushing that fits. Problem is the LCA shell is totally varible diameter for the OD of the bushing. And the housing the bushing presses into is usually gouged and not a precision machined for a good bearing surface for the nylon or derin. Do you have some ideas to overcome the OD bearing surface? Like you own shell/sleeve to press into the LCA?
I think Firm Feel makes a nylon bushing insert.