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...there are a great many examples in this thread. Amazon is a reasonably good source for the chromoplastic offerings by SKS, which come in black, white, silvery chrome with pin stripes.

Those Stainless Berthoud fenders are nice, but you have to custom drill them....which you might have to do anyway with some others. I forget where I found them online the cheapest, but you should shop around.

The nicest looking aluminum alloy fenders (for the money) are the Velo Orange ones, which come in a bewildering array of sizes and finishes. Aluminum fenders are more prone to denting than the other types. But still they work pretty well. Also available in some styles on Amazon, but Velo Orange has the full selection direct.

Honjo makes a nice fender, and now that the yen has taken a hit they might be more affordable. I've not used them myself.