I'm in NH in a 1900 or so farmhouse. It is feeling cold and to better direct the wood stove heat I'd like to be able to close off an interior area without losing the natural light. A double French door seems a nice way to do it, but after doing some on-line searching I haven't found a suitable size . It is presently a finished wood framed opening 52" wide by 77" tall. I can frame to reduce the width to a standard size but do not have flexibility on the height. Any suggestions? Like are there suppliers of custom sizes or unfinished open centre doors that could be cut down and converted into French doors?

putting 1" rigid foam insulation on the exterior and needed to extend the window trim & sills. had some recycled clear doug fir 1x3 sanded 4 sides in the garage. used the power plane to prep the sills (came out real smooth & all solid & dry sills). used titebond III to glue them up and lacking a good clamping method I set them with 2" galvanized deck screws. they pulled on really tight and everything looks good. QUESTION: would it be better to pull those screws out now that the glue is doing its job and fill with a wood filler that will really bond to the wood rather than trying to get a filler to adhere to the galvanized screw heads & wood? I thought the 3/4" 1x stock was a little thin for countersinking & wooden plugs. ALSO, whats the best filler now that the weather is colder? thanks