I am pretty sure the Dwarrowdelve is too big for a single detailed map showing every room and passage to be practical. If the cartography were mine to do I would make a large poster map showing the significant features and rgions of Moria, accomapnied by detail maps of key points, and a set of generic map modules or geomorphs that could be used to fill in the rest.
The thought of geomorphic map tiles intercting with a larger map calls to mind TSR's Lankmar which had blank squares on its map allowing individual DMs to insert square geomorphs to customize and individualize the city map. I am still not sure that this was an advantage over just finishing the map.
I think for Moria a nodal map, rather than a detailing of every room, corridor, and hall might be a better approach. Assign nodes to teh major halls and features of interest then connect them by lines labled to indicate what sort fo route they were. An adaptation to the existing Journey rules could be made for travelling withing Moria.