There's a site I use when I'm in Malaysia visiting my in-laws that's worth checking out: Frambie.com -- they go a step further in that direction, and focus on printing & framing digital photos that you upload.

So I can upload photos of my kids and their cousins, choose frames (from a handful of frame options and about a dozen possible sizes -- not custom-sized!) and they ship me framed prints ready to hang on the wall.

Pricing starts at < $4 for a framed, matted 4x6 photo -- though obviously this is a different sort of product from the OP's custom framing (and also production costs will be significantly lower in Malaysia).

yes, working on it, and right now can do it manually if someone emails the site or uses the chat box. very nice and richer experience when you have the image (e.g. - https://www.levleframes.com/artists/joey-roth/frame?levle_id...)