Hey Jim,
I lost one about 3 yrs ago and asked the Caterpiller shop where I was getting service done to find me one. Big mistake---they charged me around $70. I lost that one also the next year on a trip out west and when I got to Bend I went to Beaver Coach and bought 2 so I would have a spare. Another mistake but not as bad this time--- I think they charged me around $30 for each plus a couple bucks for the "R" decals. I thought Wow! What a good deal! LOL
I still have one but over a couple more years I have lost the other and finally just replaced with a baby moon without a decal for about $5 at a truck stop!! The Beaver still looks great and you can only see one side at a time so no big deal!! LOL
Anyway--- good luck finding them! I do have one I will sell you for about $50 with a decal! LOL