Good day mate! I am manufacturer in HKSAR with factory in China. We have developed a new product and plan to put on the market in Dec this year. Our product called "SlopeView TLL-90", it features with dual axis digital inclinometer and a ground laser for easy alignment. It measures any angle in single axis mode and any surface inclination in dual axis mode.  If you are interested to include our product in your selling list or want to evaluate it, please contact me. Here is the draft product spec. for your reference.

http://www.mib-instruments.com/Download/MIB%20SlopeView%20TLL-90%20Specification.pdf