machining help???

[vintage88]

hello everyone i was wondering if anyone here has the means to do some machining i recently optained a team pit stop chain drive rear end and want to recreate the housing out of aluminum because the person who owned it b4 me treated each screw as if it slept with his wife... now all the plastis are cracked and broken it still works but looks ugly and i wouyld like to use this setup on a whats old is new build im working on so if anyone can help it would be greatly appreciated

thank you in advance,
tim