The Vytek (Vinyl Technologies) plotters were an outgrowth of a plotter designed by Tim Booth of Norris-Booth in England and brought to the US as the Destiny 4000 plotter and the AccuCut by Newing Hall. Vinyl Technologies was contracted to be the manufacturing resource in the arrangement.
It know all this because Tim and his Mrs., Rosie, settled in West Palm Beach and we were good friends and bowling partners for many years.
My best guess is that you will find drivers for your plotter in FlexiSign and private label versions of Flexi such as Vinyl Express and others. I would be surprised if drivers are not included with SignLab. I would also feel pretty certain that the plotter should work with the generic HPGL plotters included with just about everyone's signmaking software if they don't have a specific driver included for your plotter.