Okay, I thought you are referring to "ambulance door tag lamps grommet"???? I see the schematics. PN 82470-90802 is for later 81-84, not what I have and I thought I could help with narrowing it down with the P/N I offered. On my early, these grommets do not have "snout" on them. They are just round hole grommets coming thru the body. I have a P/N around here somewhere since I replaced all of mine with new ones....I'll look in the a.m. and add them to this post.
Also, I looked on your website for the grommets you posted to buy but it's not listed yet. Will it be soon? You and have had this conversation about Grommet #30 on Mr T's master grommet sheet (aka #90480-15007, called a "hood lock cable grommet", which is approx 21mm wide-I'm still on the hunt but it looks like you have a good substitute. I want to get a couple from ya!!
15194 is approx 23mm in diameter according to the master sheet right (prod. date 7605-?
15138 is even smaller (no mention of size on sheet-prod. date 7106-7109)