Timing chain broke on 92 lumina euro and knocked

Try checking with scrap yards first. They also have crossover books that can tell what other motors use the same cover. If you know someone who works at a scrap yard they may be willing to look it up and tell you. You could also try kijiji. I have had fair luck cleaning up the old cover, gently tapping the pieces back in place and using JB Weld on the outside. Use brake cleaner or something like it to remove all trace of oil before you try this. It may still leak but it usually is only a few drops. Hope this will help.