If you don't mind spending $300+, a lot of custom bike frame builders also make stems, which can be painted to match your frame and built to any rise or reach.

One of the nicest looking threadless stems was the old Salsa SUL, which is now out of production. It was made from steel tubing that was not oversized, so it matched well with steel lugged frames. You can still buy them used on eBay, but I would caution against that because Salsa conducted a massive recall on these stems because some of them were prone to breaking. They have information about the recall on their website, along with the product codes to avoid. One of my local bike shops had one that was the perfect rise/reach for my bike but wouldn't sell it to me -- and I wouldn't have bought -- after we checked the code and it was part of the recall.

Soma Cycles has a nice selection of stems for sale on the web store, including various Nitto models that are hard to fine. They are expensive, but generally about half the price of a custom stem. You can't beat Nitto for quality, and could be a good option if you are looking for a silver stem.

Threadless Stems

I have visited another website for a company that sells a nice selection of quality threadless stems in black and silver, in various rises and reaches. I can't seem to find a link but will post if I find it later. It seems like their stems sold for about $100. They were made from tubing that was as clunk and thick as the typical threadless stem. Perhaps another forumite is familiar with the company.