I used the polaris bushings and they fit perfect. 2.49 apiece and .43 cents for the grease zert. Simple install and less than 10.50 for parts.
Just keep them greased and never worry about rusting together.
Did you add in your cost for the drill bit, tap, and the labor to put the 2 zerks in? (Not everyone carries a full line of taps, drill bits, etc.) Plus you are still using other stock parts that you have not replaced; add that cost in, as well your time to put the grease in on a regular basis, plus the $0.03 of grease every time. If you want to compare apples to apples, offer the whole picture, not just a bite.