I know OregonThruxton (member of this community) put some mini reverse cones and scrambler headers on his Thruxton. Let me shoot him a message and I'll find out where he got his.
This is his bike with reverse cones:
Edit: Found the message where he informed me what they were...
"Just ordered these from Cone Engineering. They said that they in fact make the megs for Lossa. Also, knocked the chrome finish off with scotchbrite. The look brushed stainless now. So happy with these. https://vimeo.com/107940677"
Just saw this post. Thanks for the props. The Lossa cones are made by Cone Engineering...the same ones I have on my bike. They were $100 a piece and sound bitchin'. Stainless and look exactly like mini Predators, which I previously had.