Yes, there are still plenty of leftover discontinued units of both available from many retailers. I also noted this on page two. They are now done. Over. Not in production. My rig also came with a Trail Air labeled 21k box this spring. Sold it on craigslist... Doesn't mean it's still in production. Just means both manufacturers and retailers buy their products well in advance of their sale date. Again, call Lippert. They are DONE. The fact that you have one dated this year just means you got one of the last to roll off the line. There may even be ones with a later production date than yours. However, it certainly doesn't mean they are still being made. Find the Tri Glide on Lippert's website... Find a Trail Air box not re-named as Air Ride on Lippert's website... Since you don't seem to have the motivation to use the little box in the upper right hand corner of your screen that says "Google", I'll handle the heavy lifting for you...
I'm too proud too look