Go on E-bay. You'll find 'em 1/2 to 2/3 the cost of retail. Make sure you measure 'em against an original block. MIne was 1/2 in shorter & 3/4 in narrower than a real block. I spoke to the manufacturer at SEMA about it. He said that was the first he ever heard about that but conceded that if the block is pulled too soon from the mold it can happen.