@Sambrook, the "L" is the "Laredo". IIRC, it had chrome hardware, where the Cheyenne (& Cheyenne II) had gold hardware.
For some reason, the 4004's just weren't as popular with the buyers as the "traditional" 4001 / 4003 models.
IIRC, unfortunately, they were discontinued a few years ago (can't recall when), presumably because of the lack of demand.