Quartz De ville parts

Good afternoon a new forum subscriber with a request for help.
I have recently managed to get a family heirloom quartz Deville back to running and with a nice new strap think it looks pretty good.
However with the back off it was apparent that the crown and stem have seen better days, rust being a problem.
I do intend in the future, when my watch repairing skills improve, to strip and service the watch myself. I would like to replace the crown and stem and wonder whether anyone on here can point me towards where I could buy one.

Thank you that has pointed me in the right direction. I then found a Swiss Watch parts online website with a diagram of the part numbers.