I've been slacking on this...busy with other things, haven't been able to post as much and now I forgot what and where I've seen them exactly.
Dark grey FiST last Thursday I think on E I-105 near airport at night while riding my bike. Gave them a thumbs-up as I passed by them. Not sure if they noticed.
White FoST somewhere Friday or Saturday.
Blue FiST heading S on I-405 Saturday or Sunday afternoon (most likely Sunday) around Long Beach. Gave each other thumbs-up and cruised together for a couple miles through traffic before I think they had to exit on the 605 or 22?