Help Setting Up Device with no Vendor XML

I have a couple machines using beckhoff stuff and ethercat. 
I got a small 5 axis mill that seems to use analog and digital io cards from a company called cscam from south korea. 
I think they may have gone out of business, I am trying to contact them but with no response. 

I have been looking around and cant seem to figure out how to approach this. 
Everyone seems to say just get the xml from the vendor. 
If that isnt an option can I reverse engineer this? It seems I can get a list of the pdo and sdo from the slave via a running master. 
Then it seems like some sluething and some luck and I might be able to figure it out. 

While I continue to try to find the manufacturer might anyone be willing to just give me a heads up if this is a fools errand or possible with some work and some luck. 

The machine i have is missing the pc with controller but everything else is intact so if I can just get the ethercat analog and digital cards working I am done!

Building an xml file for an I/O module is very easy
Start by typing ethercat slaves -v and record the vendor Id (vid) and product id (pid)
Then ethercat pdos and ethercat sdos will display all the information you need to write your xml