Hello,
I'm from Jacksonville and work in media production. I'd paint your device with a gravity-fed sprayer (as used for film or stage props, scenery, etc.) with any added detail by hand, if needed.
While the plastic version would work, the paint would separate over time--the more it's handled, the faster the peeling would occur. So, I'd recommend painting the metal version.
I will be coming to Gainesville to see friends over the holidays, so could pick up the speculum then, if it worked with your schedule. How soon do you need it? Any further design details would also be helpful.
I guarantee satisfaction, or there's no charge. I look forward to hearing from you.
Best,
Lance