Those profiles are normally installed with your printers software installers when you install your printer device drivers on you computer. The drivers install some paper/ink profiles. Also when you buy photo paper some paper manufactures have profiles for different printers you can install into your system.
Thank you, JJMack. It looks like my list of paper profiles didn't make the jump to my (awesome, speedy) new computer. But I'm also wondering why the Print Settings dialog box opens like that of a basic multi-function printer, not the advanced box for my Epson P-600 printer ...
For example, on macOS, there’s more than one version of the print software, so it’s very possible to see a Print dialog box with basic options instead of advanced options. The basic options might be provided by the simple Apple AirPrint driver for a printer, and to get all advanced options and profiles you would need to go to the Epson web site and download and run their printer driver installer.
Gentlemen, I owe ya, for wasting your time and your talent on an idiot. Yes, we here did an excellent job of moving everything from the old to the new computer. Everything. Including the printer. But, uh ... didn't that include the printer's drivers? No? Oh.
I just downloaded the drivers. And ... damn! Everything's there. printer dialog, paper profiles. All of it. On my Windows 10. (Thanks, Conrad.)
What can I say? I'll try not to do it again. But can't promise anything.