Make your own, take some weed eater string and heat one end up with a torch.
Then as soon as it gets black and melting smack it on something flat with a hammer.
I used an old school heavy all steel bench top, and used another block of steel to smack it flat on the burning end.
You may need to try this several times until you get it just right.
After that take a razorblade and shave a slit into the end and also trim the end to fit well.
Then you can use patch's on the end of it and this will outlast your barrel.
Some weed eater string is better than others, like the rounded stuff is the best.
I use the Hoppes bore snakes but usually throw them out after they start to feel stretched or fraying. My friends brother tried using one forever and it broke the pull string off and the thicker cleaning part was stuck in his barrel. They had no way to pull it out so we came up with the idea of burning it out. He said they would use an old coat hanger, get it cherry red and just kept poking at it until it burned through everything. I never asked if that actually worked out for him so don't quote me on it