When I first started looking at old houses I mistakenly thought replacement widows were a good feature to look for. No! Don’t replace wood windows with vinyl! Repair them. If you are in the HD it’s not just a good idea, it’s the law. If you are not, they still don’t pay for themselves over repairing the old sashes. Ben Brandt on Renwick St. tells me does this and he’s tooling up to make new replacement sashes. http://www.newburghsash.com. There must be others who can help you, too.