What pistol are we talking about? 2,000 rounds is not a lot to fire on most springs (maybe if we are talking about a hard recoiling compact pistol). If we are talking a 1911 or a Glock, there are lots of places to get rods and springs. If we are talking about something more obscure, you may have to order from the factory or try Brownell's. I am not sure what you mean by cheap design, unless we are talking plastic. Plastic rods tend to hold up as well as stainless models. Some pistols require plastic rods so that they can flex for installation and removal.
ranburr