You can always search eBay for 996 headlights as they fit Boxsters but for some reason they are listed cheaper, I got a pair for $800.00 with control module.
Here are two listings one left and one right for about $919.00 total
99 00 01 02 03 04 Porsche Boxster Left Xenon Headlight Nice | eBay
99 04 Porsche 991 996 Boxter Carrera Xenon Headlight Complete 99663105807 | eBay
Also search for "Boxter headlights" as they tend to type Boxster wrong on the listings ;-)