https://www.ebay.com/sch/i.html?_nkw=Acer+Ec+72101+001+Philips+Projector+Bare+Lamp&_sacat=0&_dmd=2

Acer Ec.72101.001 Philips Projector Bare Lamp

$145.00
$94.00

Acer EC.72101.001 Philips Replacement Lamp Compatible with these Projector Part Numbers: EC.72101.001, EC.72101.001, EC.72101001, EC72101.001, EC72101001 Model Numbers: PD-721, PD721