I bought a pair of Motion Pro Rim Shield rim protectors from Amazon. After reading Ron's article, I was hesitant, but did it anyway. They cost less than $15 for the pair (even here in California), and they arrived in two days. I haven't had a chance to mount a tire yet, but I know they will work. I used a NOS 30X3 wheel that was handy, and layed the rim protector on the rim. The advantage of using a wheel as opposed to just a rim is a spoke supports it while heating. I used a head gun as Ron suggested, and slightly pulling on it in less than a minute the old shape gave way to the new! Before it cooled I tapped the edge with a rawhide mallet just to make sure it conformed. Thanks to Ron Patterson for a great tip!
I should have proof read the post. HEAT GUN.
I have just used the guards myself on a set of newly painted McLaren wire wheels I make. Worked flawlessly!