Thomas --
In my own cheepniss and desire to thwart the world of throw away, I have gotten in the habit of taking those idler pulleys (the 2-piece spot welded ones), wire brushing them until I could see where the 5 or 6 spot welds are located that hold the 2 halves together and carefully drilling them out. Once the welds are gone or close to it, you can separate the halves , flatten things, clean up the holes etc and get the bearing out. Take the bearing over to NAPA and they can set you up with good replacements for well under 10 bucks. While you are out stop at the hardward store and get some properly sized stainless screws or bolts and nylock nuts. Put in the new bearing and bolt the two halves back together and voila. When I broke my last shoulder bolt, my lathe was still set up, so I just took an existing (larger) bolt and turned out the new shoulder bolt. That was a pain, but I didn't want to wait for mail order.
I have pics of the pulley stuff somewhere on some computer hard drive, but I took them like 5 years ago, so I won't find them any time soon.
Anyway, I have four decks with those split idler pulleys -- just doing my part to save the planet LOL.
Kendell -- glad you like the calendar.
Over and out.
Hank