2007 Winnebago Voyage top Front Marker Lights

The mounting brackets inside the marker lights "cups" have rusted away. The marker lights "cups" are built into the RV fiberglass body just under the front of the roof. Winnebago says their vendor has gone out of business and they cannot get or supply the lights. The lights do not contain bulbs. They are "containers" for the snap-in bulbs that are attached to a coach wiring harness. The bulbs work fine. I found the "marker light bulb containers" at a truck parts supply house. However, the mounting brackets did not come with the "marker light bulb containers." I cannot find the brackets. The brackets are glued into the "cups" that are built into the RV structure and the "marker light bulb containers" are attached to the brackets with screws. The screws do not penetrate any part of the RV. They are contained inside the "marker light bulb containers." Does anyone know where these brackets might be procured????