Almost anyone who's bought an old decorative has had to ponder this question: Why in the heck did they wreck that beautiful fireplace? We've all seen our share of painted-over, stripped-down, once-magnificent hearths in ruin. Too bad the owners didn't pay a visit to Victorian Treasures, a shop located in a little old house that lives up to its name. Homeowners can buy all the gear to retrofit their old inglenooks with modern gas and electric fireplaces, cast-iron coal grates, fire baskets, decorative tiles and mantels designed to look just like the old ones. They ain't cheap, but boy, are they pretty; better strike while the iron is hot.