Where to buy car parts (internal engine)?

Believe me, you could search the world over and you won't find any such thing. Do you realize that if all of a sudden your rod bearing journals grew .75 - (3/4) of of an inch the connecting rods wouldn't bolt back up. Rod bearings come in standard sizes and standard undersizes such as .010 - .020 and .030 when crankshaft grinding is necessary. Federal Mogal, Mahle Clevite, ACL, CSI and King all make engine main and rod beraings.