I have a spare pair of Great Lakes Modular WPC-UFB boards that I got for a WH2O that I didn't use. A few vendors have them listed but they all say they are out of stock. Looks like they should be good to use for STTNG if you're interested.
These are more universal and possibly more expensive than finding a OEM replacement, but if you're interested, PM me and we can figure out a price.