Rebuilding Kelsey Hayes front disk brake calipers?

This will be my first attempt at replacing the rubber bladders that are on top of the inner metal sleeves inside the calipers. I accidentally melted a couple of them because like a dummy I didn’t take the caliper apart before trying to heat up the frozen nuts on the cross over lines. So now I figured why not try to replace the rubber bladders. I don’t know if it’s a big job or can be done at home fairly easy? Is this something I shouldn’t be afraid to tackle and is there a kit to order that would be a factory replacement? Keep in mind the disk brake setup and calipers worked fine before I destroyed two of the rubber bladders. I would appreciate any guidance. Thanks
Carl