Clips arrived at my NAPA overnight, came out to $10.00 after tax.
First impression - the spring rate on these is pretty low, they can be bent between two fingers. I'm skeptical - I'd have used a thicker wire to make the spring, one that provides a bit more force.
Although it looks like I could slip them on with the center pointing outward, the manual wanted them facing inward, under the caliper.
Removed the bolt opposite the brake line and swung the caliper up.
Spring-clip installed.
I've only done the fronts. This weekend I'll probably have a grand total of ~250 highway miles, I'll report back with my findings. If I don't notice an measurable improvement, I'll try fabricating my own out of some thicker material.