looking for a couple of items...could use the help of the OT

this is in the department of you never know...

i'm looking for a couple of things that someone's father or grandfather (considering the age of the OT, may even be great-grandfather) might have hanging around...and yes I checked ebay

it HAS to be WW2 vintage...

1-Coast Artillery Corps enlisted insignia, this would be the round brass disk with crossed cannons and a shield with a shell in the middle...if you had a relative in the Anti-Aircraft Artillery, this is the insignia they wore

2-Corporal's stripes, a set of two would be WONDERFUL, but one will do...

would very much appreciate any help i could get...this is something for my dad that will go to his great-grandson...