I purchased a Yaesu FT-2900R to use as a packet/WL2K base station.
I sourced the DB9/RJ-12 (6 pair) adapter, a 7ft RJ-12/6 cable, and a 3.5mm stereo cable from Amazon. I have links to Amazon for these items above to help you find them, (disclaimer) I might make a penny from you if you use the links.
73, David