Personally, I've always been bothered by how different the finishes in silver scopes and stainless steel actions/barrels are. The fact that the match is never perfect seems to annoy me more than if they were just two different colors. I've got two builds going right now where the rings are cerakoted along with the action/barrel to match each other, which I think is the best compromise as far as looks.
That being said, I don't think Leupold makes anymore scopes in silver, so your best bet would be to find a used one off eBay. I've seen them go in your price range. Aside from that, the only new scopes I've seen in silver have been cheap, noname chinese imports.