Setting CAN Bus signals to specific High/Low levels, along with the correct hardware and API

Hello.
I've been looking for a reasonable USB2CAN interface with a good API for quite some time. I'm currently stuck with the Peak interface. It seems pretty good so far, but in my project, I'm at a point where I need to specifically set the BUS to either high or low.

In other words, I don't want to use a message based on the CAN standard (ISO 11898 or something similar), but rather create my own custom message.

1100101.

Unfortunately, as far as I can tell, that is not possible.

Can anyone help me with this?
Thank you.

It's actually not possible with a CAN interface, as its purpose is to generate only valid CAN frames. If you want to inject specific voltage levels onto the bus to, for example, simulate a fault condition (like a corrupted header CRC), I use a function generator.