I searched for a side stand enlarger for almost two years, and found only one that is specific for Triumph Rocket 3.
The product is sold by a company called X Ray Project:
XRay side stand extension plate for Triumph Rocket 3 R and GT from 2020 onwards is an extremely useful and almost indispensable accessory to allow piece of mind when leaving the bike parked on its side stand.
I installed it about one week ago, and I have attached some pictures to go along with my observations below:
1. The enlarger offers a good amount of extra area for the side stand.
2. The Rocket3 already has a rubber pad to prevent the stock side stand from hitting the exhaust.
3. The stock rubber pad does NOT screw in, it is held in place with a plug that mushrooms out of the holder. Do not remove the existing rubber pad.
4. The existing stock rubber pad is enough to prevent the enlarger from hitting the exhaust if you put away the side stand slow and careful.
5. If you pull up the side stand fast, it will hit the exhaust with the existing stock rubber pad.
6. The side stand enlarger comes with an extra thick rubber pad, for the purpose of preventing the kick stand from hitting the exhaust.
I attached the extra rubber pad with rubber cement. I will update this post if it falls off. If you do not hear from me, then no news is good news. I imaging that you can make your own rubber pad with a simple trip to a hardware store, or buy purchasing one online.