Making speed strips is easy. You can use an old garden hose, leather, plastic milk jug, surgical tubing, heavy gasket material, whatever will work. Just measure out enough length for however many cartridges your revolver holds plus a little more for holding onto with. then take a fire case (works better if its been resized) use the deburring tool to put a rudimentary edge on the case mouth and use that to cut your holes. You have now made a speed strip.
The only commercially available ones I'm aware of are for the 38/357 cartridge. I have a number of those and really like them. But I also needed strips for other calibers so I made my own. They work fine. Try it you'll like it!
Bob