Loathe as I am, of course, to recommend any commercial site, I'm giving this lot a go for digital prints online. They had more options regarding size/proportions than another site I looked at. Not bad prices, a 12x8" and 10x8" for six quid something, with postage. I wanted to be doing wet prints, and all that, but for now I just want to get stuff off the Cloud and onto a real life wall.
Online and irl interact of course, as they are here.