Source for Bering truck parts

A customer at the company I work for has a Bering MD23 with bad brakes. Bering went out of business in 2001, and was the only company to bring the Hyundai medium duty chassis to the US, so parts are not available here.
Does anyone have a source for parts for this truck?

 

They did come up in a search, however I like to use new brake pads/shoes where possible.
All I have been told about the truck is that the brakes went out and there's fluid dripping from inside the front wheel, so I am assuming the pads wore completely out, he kept running until the pad dislodged and a piston popped out of the caliper. From what I have been able to gather, it is all proprietary Hyundai stuff, and there are no direct crosses. Any of our non-US members have a source for parts?

 

I believe he ended up sourcing parts from Korea on eBay.