I do! I just bought it last Tuesday. I don't know what you want to spend, but there are brand new JD hoods and grilles for the 455's on Ebay.. Just search for John Deere 455 on Ebay and you'll get a bunch of search results.
Well I believe that the forum has over 10,000 tractor owners so I'm sure there are one or two out there that own a 455! Seems several have already pointed you in the right direction. I would watch eBay as there seems to be a never-ending stream of parts moving through there for all models of tractors! Shipping is a killer though!
I just Bought Side panels, grill, Lights, And a bunch of other stuff, The other stuff is what cost. Any way I bought all new parts, The hood/side panels get brittle when they get old. You may save a few bucks, but when you look at it you will be proud as any Deere owner , If you go with new, It also lasts longer and shows better when you want to sell it; Buy New Be Proud. life is so good;