Evanix rainstorm 1 replacement spring

I broke the spring my Evanix rainstorm 1... The spring connects to the magazine advancement mechanism.

The spring resides inside the receiver and is accessed after taking off stock and side cover plate.

I contacted evanix and they wanted $40 for freight, yowsers!!!!!! Anyone know of a domestic company that i might procure a similar spring. It is about 1/8" a round and about 3/8" long

i am open to thoughts...... (A pen spring looks too large) i will also try contacting PA this week too.

thanks