The organisation I work for has been in contact Hetzner about the issue and as a result of that, I have been contacted by Hetzner. They said that they do not yet have a solution in place and do not yet know what, if anything, will be made available. They did want to reassure my organisation that what they would be able to do no matter what the case, is to give me not only a virtual IP but also a virtual MAC that can be moved between the servers with the IP address. This would allow me to continue my HA setup. The only disadvantage is that which ever server is the master will no longer be accessable via it's normal IP while it has the virtual IP. This is only possible for me because I have a crossover cable connecting the two servers which may not be the case with other customers. I would of course prefer a different solution, but I can live with this one.