I know of no Hexmaps that have been made from any of the MWO maps.
In the case of Canyon Network the inclusion of over/underpass rock formations it is also trickier, I don't believe any BattleTech map uses different levels within a single hex, except for buildings where a ground floor, a possible basement and a roof can be discerned if you get into enough detail with the rules.
That said, Fasa made a good number of mapsheet sets for BattleTech:
http://www.sarna.net/wiki/Mapsheet
Set 5 contains 2 maps called Deep Canyon. Though personally I find the non-city maps from map pack 3 fit the style of Canyon Network better.
A program like HeavyMetal Map would allow you to make your own BattleTech style hexmaps:
http://heavymetalpro...ap_Features.htm
I have no experience with it, I've only dabbled in some free HexMap software but getting those to print the hexes/maps in the right size was an issue, especially because a standard BattleTech map is larger than A3.