I drilled and tapped blocks to fit my headstock threads.  Then drilled and tapped from the end for 1/2" bolts to hold the buffing wheels in place.  This cost me a few dollars in wood, bolts and washers for about 15 sets.  All of my buffing wheels come from Caswell Plating.  I used the advice of Tex at Durango for purchasing teh wheels and compounds.   
I eventually made one of these for each buffing wheel that I have.  They fit nice in 1 gallon zip bags.  I keep the wheel and it's buffing compound in one bag.  My wife also does jewelry and uses one of the lathe for buffing, so I have about 15 different wheels and compound combinations.  These wheel mandrels fit 1-8 threads,
The 3rd pic works the same way, but I used a piece of all thread to make the bolt part,  This was made for the fun of it.  But it works great for my specialty buffing wheels.  
I high recommend that you label your wheels to the compound that you use on that one.  These pics were taken before I screwed up and used them out of sequence.  You Never want to mix compounds on one wheel, and you DO NOT WANT to polish anything wood with a wheel that is used for metal items.