Which kind of rail covers are you looking for? They originally came out with the hard Troy ones (as per CBR240's post, butembossed with the S&W logo); if bought more recently, models seem to come with the 'ladder' type covers - I know Magpul do a variant of those, as do other companies. I think you might struggle to find the hard covers with the Smith logo - if you want that, best to email Smith directly and ask; otherwise, I'd get eyes down on Ebay and see what you can find.