Some bolts are available locally. Haven't tried cradle bolts, but often the bolts available locally aren't exact. By the time you fix the bolts, it would almost be easier to make them. Either way, it's less expensive to buy the correct bolts.
To get to the price from TFS, I would have to make hundreds of them. Probably a full bundle of rods. TFS' bolts are probably stamped or cast or something.