If you stare at the manual long enough you're realize how easy it is to fabricate the tools to remove and install new bushings using threaded rods, washers and iron pipe sleeves. The ears want to pinch together so I cut a pipe in half the size of the ear gap and put it in there to hold them apart. The bushings are only held (pinched) on one side. The other side it just a tight fit.
The uppers are little trickier because of the shaft. For the cost, you might want to just have a machine shop do it. Mine were $18 for labor for both sides of the uppers. Still, you can fab the tools to do it.
I've been doing the lower style (no shaft) myself for years on various GM cars.
Don't forget to put the spacers in the top if you have them.
A final note, some replacement bushings aren't pinch enough by the arms (slight diameter difference or wear from being swapped). Be prepared to haul the arms (upper and lower) to a welder to have them add three tack welds to the bushings to hold them in. That cost me $10 for all four arms (8 bushes and 24 tack welds).
I only use rubber.
Terry