Well, mine are old and nasty looking. I thought it would be a good idea to replace them. The one shorter one that fits behind the alternator is just a small piece of pipe. I was hoping to get another spacer and cut it to length to replace that piece, and get a new one for between the alternator "ears". I had no idea it would be so difficult to locate them. Home Depot had really small spacers, like 1/4 inch, but nothing like I was looking for.

I really appreciate all the replies, folks!