NPSS

Does anyone know of a replacement spring that will fit the ELS177 crosman model, same as the remington model, the ram feels like sponge, I tore it down and it looks really well made except for that cheap ass gas ram, these gas ram must have a shelf life cause mine went bad standing in the gun case, only had about 1000 pellets thru it, from what I read thats better than most, If no springs available, thats it for crosman, I cant afford to buy cheap air guns anymore