I usually buy frames cut and fitted from this outfit, and do the rest myself. But they might sell lengths of frame stock; I'd check because at least on cut and fitted frames they have some of the best pricing I've found.
http://123frame.net/pifrmobyle.html

I have ordered frame stock on occasion from this outfit. When I lived in the DC area there was a similar local supplier I could patronize. You have to buy a minimum of 18 feet of each stock (two 9 foot lengths), and they cut it to 4 and 5 foot lengths for shipping. http://123frame.net/pifrmobyle.html

You might also try some of the big art supply houses like Jerry's Artarama (https://www.jerrysartarama.com/) or Dick Blick (https://www.dickblick.com/)

If you're looking for unfinished wood, then a good millwork shop will likely have a much greater selection of mouldings than the big box stores, and can usually produce custom profiles (for a price of course).

I’m going to have two a 24x16 metal prints done for a friend and I have a few questions.
One image is 7621 x 5081 MP that equals 317 ppi which is well above, what most consider, the 300 ppi ideal target. The second however was cropped deeper and measures 5265 x 3510 MP or 219ppi. What is the opinion of those who know more that I do, about the quality of the print done at 219ppi? I can run it through Gigapixel x2 but worry that it might become muddy or waxy as some seem to think can happen. These will hang in a private home and most likely be viewed from 3 to 8 feet away.