You have two options. Call up a local machine shop (check Google), ask if they do one-off parts. (They probably won't); then ask them if they have any solid recommendation for a local small-time machinist that enjoys one-off work. They probably have a couple on speed dial for jobs that aren't worth their time.
You can also checkout cnczone.com , practical machinist and a number of hobby/home machinist Facebook groups.
You can also checkout cnczone.com , practical machinist and a number of hobby/home machinist Facebook groups.