You wouldn't be able to install an ash sweep setup, but you should be able to install the ring and ash pan if you really wanted to.
The only hang ups would be how you mounted the ring to the bowl, and how you would adjust/close the vents. You would have to be somewhat creative, but plenty of guys have added newer bowl rings onto older one-touch kettles. I don't see why you couldn't do it for a three wheeler as well. The adjusting and closing the vents would be the big hangup I believe. I'm not sure it's worth the effort.
For the price of a new ash pan, you could probably find a one touch kettle on Craigslist. I'd probably go that route, and keep the three wheeler around as a backup or 2nd kettle