Trumpeter service ?

Trumpeter has zero customer service up to this point. They rely on any retailers to cover that angle. If you are a member of other Hobby websites that have want and for sale boards, you might try those to find your part. The same goes for their alter ego of Hobby Boss. I bought a kit of theirs at IPMS that was missing the PE fret. No joy.

Great 

I'm building a 1/32 P-40B AVG ,the crown jewel of my modeling so far ,and the canopy,wind screen and bullet proof glass all have defects inside the plastic that can't be polished out.

You might find what you need here. It is their official replacement service, but I think you have to pay!!

https://www.aliexpress.com/store/1970125

I feel your pain ..i also had a problem with trumpeter..ive them very poor marks on there costumers service. (Great kits )though dealing with them sucks 

TY snapdragon, lotsa parts there. I emailed them.