Me too am looking for a good supplier for alu-prints. Didn't find one yet, mostly because I want very small sizes, 7x7 or 9x9 cm. Would be great for selling too.
@mastermek I've been thinking about at least 30x30 cm. But yes, they'd be great for interior design and I'm guessing selling them might not be terribly difficult. But then, I could be wrong. :D