Today I gave the interior a wash to give it a more leather look. And also added some older type Willis Shaw decals some of you older truckers like me probably remember when they ran this type of decals.
I’m with Brian I would just make a new Stirrup out of wire. I used to have a real 1.1 Pete Sleeper like yours I sold it for Scrap but kept the stirrups. If I find them I’ll post a pic for you