Need seatbelt buckle

[73gitane]

I need a replacement seatbelt buckle in the coach. I only need the side that plugs into the receiver. Somehow the metal bar that slides against and pinches the nylon strap got lost. It's an old Coachmen class B but I noticed it uses the same buckle of a current Roadtrek I recently saw at a dealer. it was easy to recognize as it has a world map drawing at the button of the receiver.

Of course the dealer wants me to buy a complete set. I'm thinking all I need is the metal clip and I can loop it onto the existing nylon strap. Does anyone have a source for this silly little part? Since Roadtrek uses the same buckle today I'm hoping I can get this part off the shelf.

Thanks,
Steve