Look into the 1284x key - it's used by the majority of police cars in the US , and you can easily find it on ebay for super cheap. Once you get one, you can get it copied at a hardware store and hand them out to comrades before protests.
Here's a talk discussing things that are commonly keyed, it's very good and definitely worth your time to watch https://www.youtube.com/watch?v=a9b9IYqsb_U (I was planning to make this post today but u/alfrednobel already posted the same talk lol, guess we had the same idea)
Other keys to look into would be the ones to doorking systems for apartment buildings - those boxes that let you buzz in to go inside. They have common maintenance keys, and with that key and a piece of wire you can let yourself into the building if you need to hide out for a while. These are the 16120 and 222343 keys. Again, watch the talk, it goes into this.
Stay safe comrades!
Why am I not surprised.
You posted the parts catalogue as one of the first links - that catalogue has a picture of the gas key in it. It's a shitty cam lock. Same with the door lock, as you mentioned.
And we all know what happens when you put sugar in a gas tank...............
Nothing apparently, mythbusters did the sugar in the gas tanks and it didn't work. I think just water will shut it down short term. But if you have access to the oil, just add sodium silicate and have a dead engine. It might also work in the fuel, as it's soluble in water and should get past the filter.
Edit: from the operator manual there is a water in fuel warning light "Water in Fuel: Indicates the fuel may contain water. Drain any water collected in the fuel/ water separators."
It is a diesel engine, so a 75:25 diesel:gasoline blend would fuck it up.
Also, apparently, aviation fuel will also wreck it.
Also, check out Eco Defense: A Guide to Monkeywrenching