Hi friends, I just received a refurb'd VT-420 with green screen. I see that I need a special 6 pin/modular-type cable for the comm port. I located the adapter to get to DB25 ( https://www.ebay.com/itm/262041938994 ) but I need the interconnecting cable. Anyone know what it is called? Anyone have one for sale? 73 Eugene W2HX