Back in the mid-1990's, several 07/02s advertised the RLL-to-RDIAS conversion in Shotgun News. Some wrapped the RLL around the new DIAS body; some simply transferred the SN to a brand new DIAS (I have seen one of these here in Florida).
I am also aware of someone who bought a John Norrell RDIAS and was having trouble getting it to work. He sent photos to Mr. Norrell, who took one look and said, "I didn't make that, and I will not repair it." He sent the owner photos of the ones he built, which were much more precisely machined, and obviously it was a handmade replacement.
RDIAS are tiny items easy to lose (particularly back when they first came out and when they were not as valuable).
I know of one that dropped out of a receiver when being packed up at the end of a range session. The owner discovered it was missing when he got home, so he drove back to the range ... and thankfully, he found it.
A second one I know of, the owner put it in his pocket, which he did not realize had a hole in it. That one was never found.
I know of a third one which the owner carefully placed on the top shelf of his safe, which was filled with lots of other guns. When he went to get it, it was nowhere to be found. A year later, he took everything out of his safe to rearrange the contents ... and found it wedged between rear edge of the shelf and the back wall of the safe.
Bottom line is, when you own a $30k item that small, it behooves you to be ulltra-careful.