There are a number of after market companys that offer Vesa compatible adapters for non Vesa monitors. Just have to Google for them. Don't know if your monitor is adaptable. One company even makes a cradle mount that holds just about anything.
Did you put any consideration into what type of mounting you wanted your monitor to have before deciding on your selection? The 4 monitors and 3 Tv's in this house are all on Vesa mounts.