I found 6 carrier boards from makers other than Connect Tech that support Jetson AGX Orin, have CAN bus and have at least 4 Ethernet ports:
| Board | Maker | Ethernet ports (fastest port) | CAN ports | Supported Jetson families |
|---|---|---|---|---|
| ASR-A701 | Advantech | 4 (2.5GbE) | 2* | Jetson Orin NX, Jetson AGX Orin |
| RTSO-2001 | Realtimes | 5 (10GbE) | 4 | Jetson AGX Orin |
| RTSO-2002 | Realtimes | 5 (1GbE) | 2 | Jetson AGX Orin |
| MILBOARD-AGX | Forecr | 4 (1GbE) | 2 | Jetson AGX Orin, AGX Orin Industrial, AGX Xavier, AGX Xavier Industrial |
| MILBOARD-AGXMAX | Forecr | 4 (10GbE) | 2 (isolated CAN FD) | Jetson AGX Orin, AGX Orin Industrial |
| A800 | Leetop | 5 (10GbE) | 11 | Jetson AGX Orin |
*Advantech lists up to two CAN ports on the AGX Orin versions of the ASR-A701. The Orin NX version has one.
For comparison, your Forge has 4 Ethernet ports (fastest 10GbE) and 2 CAN ports, and supports Jetson AGX Orin and AGX Orin Industrial.
These might also work, but I can't confirm it: Leetop's A680 and A680_I both have 6 Ethernet ports (fastest 10GbE) and support AGX Orin, but I couldn't find whether they have CAN bus. Leetop's spec sheets should answer that.
Before you pick one, check the datasheets for power input, operating temperature and connector layout against your machine. I compared only the three features you asked about.