Injector Sleeve Tools

[Robin]

Hey all,
My old faithful workhorse seems to need an injector sleeve replaced. I'm wondering if anyone in the area has an injector removal and replacement tool set that I've seen on the repair videos that they could rent me for a few days.
I'm in Eugene, Oregon with injectors out on one side and discovered the problem when replacing the injectors while purging the cylinders. Number 7 had coolant in it.
What do you think about just replacing just the one failed cup?
I'm really a carpenter and not a mechanic, just doing this work myself cause my own employment is kind of sparse. I take excellent care of my own tools and will treat yours with utmost care also.
Thanks,
Robin