33850-SL0-A01 (lens & bulb holder, LEFT) is discontinued both in North America and Japan, but the parts are available separately. American Acura has this part, 33851-SL0-A01, which is the lens subpart. It includes the rubber seal to the body, but does not include the bulb, holder, or holder seal. Note that Left & Right are not interchangable.
According the parts diagram, the metal clip that holds it in the body is not included with 33851-SL0-A01, but when I ordered it this summer, it DID include the clip. I got both Left and Right from OEMAcuraParts.com - Thanks Tim!
Will this help?