Is there any kind of logic to the placement of the panels prior to your randomization (in the order that they are loaded) so that you that way can distinguish the placement of the panels, as to not get the types next to each other?
Alternatively you can attempt to play with the boundingbox and intersect nodes to try and sort your panels of building 127 to not be next to each other. 
Unfortunately I cannot do any testing as I would need the .rvt file with the families loaded