American Metal Products Oval Gas Vent 6.9-in x 4.5-in x 7.1-in Galvanized Steel Oval Stackhead Duct Boot in the Duct Transitions & Connectors department at Lowes.com
Dual Oval AC Vent 30° - DOAC30 - Affordable Street Rods
22 in. Large Oval Fleur-De-Lis Vent WF004A - The Home Depot