Ok, seeing as your already committed to spending the $135, I'll assume that you won't mind trying a last ditch effort to salvage the cylinder. Everyone else, don't try this at home.
Buy a Brass Cylinder Chamber Brush from a local dealer or online. They are bigger diameter and meant for cylinder work only. Never, ever use them in your guns bore. They are also available in Stainless Steel, which is much more agressive and needs to be used with more care...
Next, get some brand of lead removal bore cleaner and soak those chambers for a good long while. Let the stuff have time to do it's job. Next get a variable speed drill and use a single length of cleaning rod (short section) and chuck it in your drill, then attach the cylinder chamber brush. At low speed slowly run the brush back and forth through each cylinder several times until your sure you've cleaned any evidence of carbon build up in your chambers. Wipe them down and patch until dry. Next get a .45 bore mop and hit it with some Flitz. Same routine polishing out the marks from the chamber brush. Don't overdo either step. You can give it a try and then try again later.....sneak up on it.
Try not to get anything in the ejector rod tube. Use some Hoppes or Rem oil and brush and clean everything spotless ~ when your done. I own the tools to pull the ejector rod out and strip the cylinder down when I do this...but if you exercise great care you can do this with everything in place.
Anyone else wishing to chime in...please lend a hand...or call me an idiot.

Hey, it's worth a shot....pun intended.
giz