How difficult would it be to port your Chaos model into Blender, and can you point me in the right direction of some tutorials or other guides to do so?
Pretty straightforward, I'd imagine.
As to getting started there, you have two routes: the classic decompilation route, or the newfangled direct-import route.
For classic decompilation, you'll want to look into how to set up Crowbar and use it to decompile the model, and then use the Blender Source Tools to import the decompiled mesh into Blender.
For the newfangled direct-import, there is a Blender tool that can supposedly directly import the model straight into Blender, with all the bells and whistles that you'd otherwise have to assemble yourself via the decompilation route. I've never used the latter, so I can't speak for its efficacy.
Either way, once you've got the model into Blender, you're outside my wheelhouse and I am entrusting you to the plethora of general Blender use guides that exist on the Internet.