Milodon Pick-up tube

Any idea where one might be able to acquire a single truck main bolt? A part number might work well too. I called the dealer before about just replacement main bolts for my engine and they didn't have a listing, said I may have to get new caps to get the bolts, so a straight part number to tell them would be nice. Also, can you modify the stock car windage tray to make the pickup work or would I need to look into getting a truck tray too? This silly engine is really starting to nickel and dime me to death, getting kind of frustrating learning all the problems no one has mentioned before.