I have a gs-r bottom that is being sleeved. The machine shop told me that 2 of my crank caps have cracks in them and they are no good. I heard it is not good to mix and match caps. Can someone please let me know what can be done to save this block and not let it go to the dumpster?

I also found a whole set of used crank caps for a gs-r can they be used? Comes with all of them.