the 4015n?
HP PCL 6, HP PCL 5e, HP postscript level 3 emulation, direct PDF (v 1.4) printing (with at least 128 MB printer memory)
I am not sure about the USB port or if it would work. you can send PCL commands to port 9100 and they will print over a network though. I never got real robust or even finished my project but I have got characters to print or sentences.