Canon Knowledge Base - The XL series camcorders will accept all Canon XL mount lenses
Amazon.com : Fotodiox Pro Lens Mount Adapter Compatible with Canon FD, FL, New FD Lens to Canon XL Mount Video Camera. XL-1, XL-1s, XL-2, XL-H1 HDV Camcorder : Electronics
Canon 3x Wide Zoom Lens for Canon XL-2 and XL-1 3159A002 B&H
Canon 6x Zoom XL 3.4-20.4mm HD Lens
Canon Professional Video Lens 20X Zoom XL 5.4-108mm L IS f/1.6-3.5 | eBay
Mount Adapter for M42 Lens to Canon XL Mount Video Camera - Walmart.com