O.K. Takes me awhile sometimes, but I understand. If you want all wound strings on your Baritone, it can be done. Any wound string, however, will put greater strain on your instrument than the same pitch in treble material. The first thing, then, is to go back to your standard Baritone set for strings 3 & 4. Put higher tension there, along with wound strings in the 1st & 2nd positions, and you stand an excellent chance of damaging your instrument.
After you're back to normal with 3 & 4, LaBella can supply wound aluminum for 1 & 2. Here's the page:
https://www.labella.com/laplaza/ind_strings/default.asp?CategoryID=7
It will take a bit of experimentation to get it right. If this appeals to you, I have some of these on hand, and can give you a rough idea of where to start.
That said, the Baritone was designed to be the smallest possible vehicle for "guitar tuning". In our opinion, it's really already a little small for that tuning. Adding extra volume to the little body, as you have begun to see, does not usually bring pleasing results.
If you really want more of a 4-string steel guitar sound, think about a Tenor Guitar - 4 strings & with steel string construction. Of course, we make one too, but that one is unique in that it's built for classicals.