All of the major chain stores will loan them to you for free. There are several different designs.
When I had to replace a broken exhaust valve spring on a '66 Toronado, I picked up 3 different tools from Auto Zone, Advance, and O'Reilly. As it turned out, one style was easier for removal and another design was easier for installation.
Get whatever ones are available and figure out which works best when you get them in the garage. Since they're free, it doesn't matter if you borrow one and don't use it.
