Let the shop do it ,its about that price,just talk to the guys that did it originally and they should atleast cut you a deal on the new ones and let them know the reason is because the cam was really tight and would not fit.
I would also take my cam with me when I picked the block up and try to install it right then and there so they can see for themselves if it does not fit correctly.
Cam bearings are picky about installation /orientation and thats why the tool is 200 bucks,plus they are no fun to deal with way up inside the block.
The cheapest tool is not the one you want for this job.