Hi, I was thinking about the challenge you had earlier in the thread about getting pictures of your work to come out the way it looks in person. This may or may not work, but it might be worth a try.
Instead of taking the picture digitally, instead use a a pro quality film such as kodak Ektar 100.
KODAK PROFESSIONAL EKTAR 100 Film / 135
Just have the negatives developed, and then scan it with a high color bit depth scanner, not the ones at walmart. I have one and will happily scan some for you if you like. It turns out that scanners like this are pretty reasonably priced, as they don't really have to be concerned all that much about the time to capture the image or varying light conditions.
If you don't own a film camera, surely someone locally does, or you can get great ones off of craigslist of ebay for almost nothing.
I suspect (don't know for sure) that the challenge you are having is with color bit depth. It is very hard to make a digital camera with high resolution, usable speed, and high color bit depth. (except at very high prices) Very few really have it all. Film has the advantage of 100 years of engineering, but the known limitations.