hi simplyify 3d will do it but you can split the print into two shells or the same way you do two colour print and use the other fillament for support material but you need mesh mixer or some thing like that rick
Simplify3D costs $149, not $1,100. Yes it’s not free, but if you want to have the most control of support structures and be able to edit just about everything about them, Simplify3D is the way to go. There is no other slicing program that comes close to Simplify’s capabilities with support generation.
Free slicers like Cura work fine for most prints, but Woz specifically asked about support generation for dual extruders.