I was relatively lucky on my build but I was flexible on barrel length and contour. After following Green Frog's build I started searching for components. I found the .22 cylinder on Gunbroker really cheap as the seller had listed it 3 times without selling. Then an 8 3/8 Model 16-4 barrel popped up on eBay and I ponied up the BIN price to save the time and expense of the re-bore. I'm sure the barrel also saved me a ton of money on the conversion as fitting a barrel is a pretty straightforward task for a smith like Andy. I also sold the 19-3 barrel and cylinder for a decent price on eBay. I've just picked up a 4" 16-4 barrel and paid a heavy price for a .22 cylinder for the next build. Just looking for a shooter grade 19 to start the next one. This one will be a woods/carry gun so no expense on aesthetics.