@Westfield Sports Car Club Just get a new server (dedicated or vps whatever you require) set up a new OS and all the bits and bobs (mariadb, firewalls and mail etc) and install IPS and migrate the DB over - and then alter the DNS for the new IP address - Done this a good few times now and its relatively painless...... with little downtime.......
Or move to IPS hosting and all your server headaches will go away - we did this on one of our forums and its been very good....