Model 39 slide shot??

I have two (2) model 39's Like them . I notice ,with mucho alarm , one of them is hanging up....so cleaned completly...no better next stripped down and swap componants..bushings,rod and spring,barrels ..you know ,one at a time and still this same one was troubled. THEN I saw the problem.. the slide rails are worn out in rear by de-cocker,also on left side of slide, below the 2nd s in the word Wesson, when tilted just right ,you can see a hole where the slide lock lever engages.Plus it appears rounded and pined on the flat surface below firing pin. Can I buy another slide?? Do you know where? The weapon doesn't look much diff. then it's brother , but I reckon someone really used it alot . Steveoh the seriel # is a146027 ..39-2 P.S. It looks to me that the alloy frame would wear out before the solid steel slide would. You have ideas??