I still have my beloved Parker 45s but the squeeze reservoirs perished. I tried quite a few screw and pull piston reservoirs but all have the problem of not ve

I still have my beloved Parker 45s but the squeeze reservoirs perished. I tried quite a few screw and pull piston reservoirs but all have the problem of not venting or something so the ink only runs for a short while then is held back by vacuum (or something). Has anyone found a source of Parker 45 reservoirs that work?