Often such leaks are coming from the ferrules where the hose fittings are swaged to the hoses so make sure you are correct in suspecting the swivel fittings. If it is the ferrules, you can order exact replacement hoses from HWH (I'm assuming HWH is the manufacturer). I don't know about the jacks but, with HWH slides, some hoses may seem excessively long and tied up in bundles. This is by design in order to ensure synchronization of paired cylinders. Don't be tempted to tidy things up with shorter hoses. Exact replacements are the way to go.
2002 Itasca Suncruiser 35U