kwc makes a metal slide plastic lower desert eagle. There is a metal frame for them but near impossible to get. Tm has the 1ek kit but those arnt made any more.
it may take a few trys to find your side arm of choice. After a hicapa and a deagle I have finally settled on a hfc m11. I am a very noisy player between that and my scar lol.
btw stay away from the kwc desert eagle. The nozzle and blow back unit suck and gave me nothing but problems.