but, I did some research:
the outer bushing cost $24.64 from Fastlane. Baum tools have the press that it is needed for pulling/pushing the old/new bushing in place. Bad news is, it is expensive around $100.
So whenever I get a chance I may take the car to Steve Brotherton in Gainesville (1 hour away) for replace the bushings and some other "things" on my car at the same time.
I do not have a quote for the job, but with that tool, it seems pretty straigh forward.
OTOH, it does not seem complicated to make your own...if you have the time!
Good luck!

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J.H.
'86 300E