Your wife is crazy smart.
Lots of MIL options out there. Check out these Austrian shells for $100 CAD:
https://www.varusteleka.com/en/searc...n%20waterproof
For less, new, unissued CF:
http://frontierfirearms.ca/new-uniss...rain-trousers/
http://frontierfirearms.ca/new-uniss...ces-rain-coat/
We're talking proven, new gear here.
Wow...can't imagine making a $1500 investment in rain gear...