Well, I finally got my new Velvac mirror bases and was able to install them yesterday to complete the exterior facelift. To say that the chrome on the Velvac mirrors is poor is an understatement. This is the second time I have had to replace the bases. I replaced both complete mirrors about 4-years ago as an assembly due to peeling and flaking chrome. This time the chrome on the heads and arms looks fine but the bases had chrome peeling off in small sheets.
Here is the driver's side mirror base.

Passenger side. Not nearly as bad but you can see it bubbling up around the bolt hole openings.

Here is the part number for the new bases. These should be the same for most if not all early to mid-2000 Monaco coaches. The part number is not listed on Velvac's website. I had to call them and give them the part number for the entire assembly and they looked up the bases from there. The entire mirror assemblies were extremely expensive and the bases are still overpriced for what you get.

Word of advice here, remove the 3/8" set screws that secure the arms in the base and anti-seize them thoroughly. I place some on a small screwdriver and reach into the thread bore to place a small amount and then coat the set screw itself. I am glad I did this when I replaced the mirrors four years ago as I fought getting them apart last time and they came right out this time. They leave the set screws in when they chrome the bases and if you merely run them in to secure the arms they WILL rust in there solid. It is worth the two minutes to remove them, blow out the threads and give them a coating of anti-seize.

Left base replaced and the mirror reassembled.

Left mirror completed and polished up.

Right mirror replaced and polished up.

Well she is finally presentable again and ready to be seen.
Mike.