Seeking software upgrade for Tropos OEM Motorola Hotzones.

There can be no doubt that Cambium (formerly Motorola Canopy products) no longer supports Motorola Hotzones in any way; and Tropos hasn’t had any enquiries for a couple of years. Both admit thes units are unsupported. Does anyone know of any software upgrades or files available; because both companies simply do not support these obsolete units. Its worth some money if anyone can help me out with updated software past version 6.6. Thanks