Hi,
The Jetson-based package can be found in the JetPack.
If you have setup the device with SDKmanager, they should be located at ${HOME}/Downloads/nvidia/sdkm_downloads.
We also have some images that includes TensorRT as the prebuilt package.
For example, nvcr.io/nvidia/deepstream-l4t:5.1-21.02-base:
Thanks.