I ran across this morning and wanted to share with everyone

Key Features:
• TRD Sport Tuned, specifically for the tC
• Adjustable ride height with 6061 T-6 billet aluminum collars
• Short strut cartridge for improved wheel travel
o Twin-tube design, precise 35mm bore, and electroless nickel plating
• 2.50” ID linear rate springs
• Race tested and proven performance
• Includes dampers, springs, bump stops, and all necessary installation hardware

part number PTR11-21070

 

Ya, we figure they're just made by Progress (like the TRD rear sway apparently is).

https://www.scionlife.com/forums/viewtopic.php?t=171242

One of the TRDSparks guys has a thread in Sponsored Sales as well, I think.