ISO Pine Subflooring - 4.5" or better

Hello: I am in search of 4.5″ or larger pine subflooring to patch in some flooring in a old brownstone. Flooring is about 1″ thick and has a tongue and groove. Anyone tearing this out of their old brownstone or have extra from a similar procedure? I can’t tell you how much of this we’ve dumped throughout the years….it’s killing me right now! Thanks for any leads. I need about 50-100SF