Parts Express (www.partsexpress.com) has lot's of them-their Selenium selection has some big 'uns (500 Hz)- or EV is still in the business.I just got some 125 hz cutoff BIG horns (48"X24") fed by a 12" EV, and a 1Khz horn in the middle- fed by a 2" exit DH1t EV HF driver- boy these things play clean and LOUD (retired cinema speakers). One set per side, a dual driver 15" W binn below, and it rocks.
--Larry Acklin
(Acklin Sound)