Locally theres a window company, you talke the sealed glass and frame
in the early AM, and pick it up late afternoon.
they are experts at taking apart the window and frame, with age the
screws stick and rust, dis similiar metals corrode.
I had one done recently about 80 bucks for roughly your size.
Pittsburgh window and door millvale pa.
No doubt your area has a similiar business
figure several times more for a pro to come to you, measure, order
units, then return and install. frequently a new window is cheaper than
a pro repair