I needed a set of side plate screws for my '80s 586, and the fellow at Smith told me they "Don't service guns that old." Numrich..no luck. I found a business on line called Jack First, and ordered a set. The lady I spoke with knows her business. Excellent parts, a little expen$ive but fair, but be prepared for the "one size fits all" shipping! Expensive small parts order, but, that's life!