You can try our own Greenbone Community Edition (GCE) Virtual Machine (see About the Greenbone Community Edition (GCE) VM category) or build it by yourself (See About the Greenbone Source Edition (GSE) category). I am currently not aware of a distribution shipping packages for GVM 11.
Of course you also can buy one of our products which always use the latest release.
Additionally gvm-tools - which are the replacement for the omp executable - still work with GVM/OpenVAS 9.