Making your own bushings are much more accurate than the factory bushings.
Making your own is warranted. It not only improves your skills, but for the cost of factory bushings, you can buy a full rod of steel and make several sets of bushings, and the cost of the custom bushings further warrants making your own. If you have the means to make them, it is much less expensive and much more accurate.
I get 6' rods for about a dollar a ft. You should be able to get at least four sets per ft. Even with a high amount of waste, you are clearly ahead.