RE: HPI Savage x or Losi Monster Truck
The ones for the LST aren't discontinued. You can buy them directly from RPM or a lot of hobbyshops have them, including tower hobbies. For the Raminator you don't need the adapters, that's only for the LST2 and Muggy. I've seen a lot of people reccomend getting the Dynamite engine brace because they say the stock one is weak, however I'm still running the stock one on my Raminator so I don't know.