You might want to check out Monarch Covers. The can reproduce just about any style, Metal or Wood. Just a word of caution about them: If you order just one or two custom covers, it might take a while for them to fill your order, like up to 8-10 months. You might want to call them and talk to a representative.

I've attached a link to their site:

Here is a link that might be useful: Monarch Covers

We fabricate custom radiator covers for any heat source, have honest, quality service and fair prices. We offer a lot of options for our radiator enclosures and will build your cover exactly the way you want it. We also fabricate radiator covers with dampening systems to control heat in spaces without zoned heating. You can find out more at jayscustomcovers.com

Thanks, Jay

Here is a link that might be useful: radiator covers

If you're looking for a wooden radiator cover www.cbradiatorcovers.com has a traditional design. They are located on Long Island.

Here is a link that might be useful: radiator covers