[1987SierraClassic]

I had my '87 in the body shop and the guy lost his lease halfway through the restoration (and lost a good bit of parts to my truck too.) The cab has been redone with new GM doors and the rusted ones got tossed. My question is this: Is there a bracket that bolts to the inside of the door to mount the mirrors? (Luckily, I still have the mirrors.) I haven't taken my Suburban apart to look...

Thanks!