Hi S'B, I've recently used linen buffing wheels, (one I got from my dad's gear 40 years ago) and the other I purchased recently from Australian Abrasives Supplies
http://www.australianabrasives.com/mops.htm . I'd also suggest that you search this forum using "swansdown". I found the UBeaut reference on Google that Tex mentioned as well as a few references from this forum.
There are various grades of cutting and polishing compounds available You can buy a special mandril to fit onto the end of a bench grinder's shaft to mount the Mop. I use a 3/8th dome head bolt with washers and nut and shove in to the chuck of my drill press. I paint my wind chime heads with Epoxy and after sanding with 600/1200 grit polish to a high finish with the mop. I'm sure there will be a combination to suit your needs. Good luck
Edited Post...removed extra link