As luck would have it I found it in the first Black and Decker catalog I looked in on the first page I looked at.
1946
Under Carbon Cleaning Tools
Valve Guide Cleaner
Looks like it may be the 21449 7/16 to 31/64 inch
Made of spring wire set spirally about a stem and expanded to give heavy cleaning tension. A few strokes with this cleaner driven by a 1/4 inch drill thoroughly cleans and polishes the valve guide.
