Why not build your own system?
I work in Shipyard and I have build few gansets with ComAp controllers (full engine and electricity monintoring)
Same company also make simple engine controllers.
Here is controller description:
Modular system for control, monitoring and protection of the diesel powered pumps
Central unit with graphical display
Communication interface: RS232, CAN bus, J1939
14 configurable inputs and outputs
8 configurable analogue iputs, 1 RPM input
Compatible with Inteli I/O extension modules
UL certified
Direct, Modem or Internet connection
Active call receiving
All measured values include J1939 data monitoring
History record - alarm and operational states listing
Setpoints adjusting
Here is screen shoot:
And here is company home page:
http://www.comap.cz/index.php