Yea I dont get it.. why would he not know if the bushings are available.. Its there job to have, install and keep the stuff on hand.. My little machine shop guy does.
No reason why they Gaul in the first place.
If this is the guy who assembled the rods and pistons the first time.. Find another shop, cause they didnt check for pin fit, which is not just a common knowledge procedure, but is mandatory fact.
Im sorry but as simple and common as this is is not a excusable mistake that could result in catastrophic engine failure as this.