Do you offer ISPConfig?
Yes, we offer it through our Ecohost servers, see: Services & Apps > ISPConfig
The problem with ISPConfig on shared servers is that these things can never be properly secured. Users can't be properly isolated so there is nothing stopping someone with access to an account, and who knows what they are doing, from accessing all other users' data. This is far less of an issue when you just have a small number of trusted users sharing a server. If that is not the case, and you definitely want to use ISPConfig, consider having your own virtual server running it (or just the key applications you need).