Holy matelassé and liseré! How did we miss telling you about this sample sale, especially when there are only two days left?!#$% One of our favorite fabric houses is slashing prices and we let the sale slip right through our proverbial fingers. The very elegant house of Brunschwig & Fils is staging its first-ever sample sale in the city, and here we are telling you about it a little late... Just walk through the newly opened Kips Bay Showhouse on East 82nd St., and you're bound to find Brunschwig fabrics. A perennial favorite -- like Clarence House and Scalamandre -- Brunschwig goods are always found in the best of homes, so you’ll be all the more pleased to see that everything is at least 50% off -- and that’s good ’cause this stuff is very dear. Look for wallpaper and fabric, as well as upholstered lamps, tables, and furniture -- like comfy armchairs. TODAY, THURSDAY (9am to 6:30pm) and TOMORROW, FRIDAY (9am to 5pm) at the Metropolitan North Pavilion, 110 W. 19th St. (between Sixth and Seventh Aves.) All sales final; credit cards only. And if you’re buying bulky stuff, our friends at Soiffer Haskin, who are staging this sale, have a shipper on the premises to send it, lug it, ship it, whatever…in other words, get it from there to your living room.