In 1986 this ad appeared by Micro-W. I almost missed this at the bottom of the ad: The NEW CLONE BUSTER cartridge for the 64. It goes on to say that it is the best memory capture device available. Snapshot your software and save it out to standard Commodore DOS. This will back-up most 64 software and remove the annoying error tracks and difficult to load protection.

“Ron Smith: …Codebuster/SNAPSHOT 64 was rom based while all of the Super Snapshot series was rom and ram. The product was also sold for a very short time under the name of Clonebuster (or something like that … it was a US company and we parted ways quite quickly)….” 
Here are PDF instructions: Clonebuster_Instructions

Photo’s by Jim Drew