Daniel, I know you asked for ENT era character sheets, but if you need ENT era starship sheets (United Earth and 22nd Cent Romulan), I have a few fillable starship PDFs that you might find interesting for an Earth-Romulan War campaign. Reply here if you’re interested. (Too bad this forum doesn’t have PMs.)
But OMG yes, I’d love a Dominion War mission/story compendium also. Being a Niner, the Dominion War era is my favorite Star Trek era.