most folks just make one- mine looks like a cowboy boot puller- 2 pieces of wood screwed at 90 degrees to each other, and a 45 degree v notch to hold the front sight- take you all of 10 minutes to do the job- mof, all you should be buying is powder and caps- the rest of the accoutrements you either make yourself or get somebody that s good with leather to make it fer you- I found it easier to load the cylinder in the revolver- that way you don't run the risk of pinching a cap when changing cylinders- now sure, in the period some folks used to keep a spare cylinder or 2 and change on the fly, but you also run the risk of a pinched cap or detonation- what I would do is charge however many cylinders you want using the gun's ramrod ( that way you get a good tight seal) and Crisco or wheel bearing lube and then dismount the cylinder , and don't cap it until you're ready to actually fire- of course, if you do get spare cylinders, you need to verify the timing- ie the chamber lines up with the barrel- it's not just a drop in thing if you want to do it safely and take note that cylinders are expensive- ruger recommends a trip back to the factory if you get a new cylinder- I've had my old army since 74 and never got a cylinder yet-