(Voice of pessimism)
A 14-15 year old custom built part is going to be tough to come by...
Definitely post pix.
It might be possible to repair your broken piece or fabricate something workable. Especially since the mirror image (other side) is still intact.
TT 2015 19RD "TheJayco"
TV 2003 F-350 "Montblanc" - Housebroken chore truck
Sitting in The Cheap Seats.
And proud of it!