PG,
Okay, I'll pull the old kit and the Tomahawk missiles and take some pics and measurements for ya.
Don't pull your hair out over setbacks - even the pros have days like yours. Maschinen Krieger creator Kow Yokoyama had a similar accident when he was scratchbuilding his Dollhouse missile tank. The story goes he had one of those arm mounted work lights at his bench, forgot to turn the light off (this was the 1980s so the bulb was incandescent, not LED), and went out for a bit. Well, as fate would have it, the lamp slowwwwwly sagged to a point where it was over the turret he had built. The hot light bulb melted a portion of the turret, but in an inspired moment, he kept the damage and worked it into his build!
When life gives you lemons, make lemonade. If you don't like lemonade, just throw the darn things back at 'em! And go for the eyes!
Ooh, I just had a thought - I know, super dangerous, like a rabid dog in a supermarket. Can you still attach the damaged shoulder to the body and arm? Maybe use some rare earth magnets to make a swappable shoulder. One all blown-up with a mangled missile bay, and one pristine bay? I can give you the old decal sheet if there are any markings on the shoulder to decorate the blown-up version.
Sorry, I'm doing it again. Bothering the other kids and being a distraction. The problem with being an adult is that there are no teachers to drag me by the arm into the "Time Out" corner!