Welcome back. (I assume we won't be seeing Mr. mooncake around much anymore?)
Cranks beyond 175 are very rare these days. I'm running 180mm XTR 5-bolt (back from 1995 when it still looked like a classic crank) with a 102mm D/A square-taper bottom bracket to get correct chainline with a road bike. 50/36/24 chainrings. So I've got a compact with a bailout gear for if I ever go to the mountains. So yeah, old MTB cranks in 110mm bolt-pattern are the closest that you'll come. You'll probably need to get new chainrings. Look around on eBay for pre-1994 XT or Deore cranks in 110 bolt-pattern. Use Sheldon's bottom bracket database to figure out correct bottom bracket length (you'll want to go 5mm shorter for a road bike than the "correct" bottom bracket for the mountain crank, as the road rear wheel is 5mm narrower spacing - this is why I'm using the 102mm D/A bottom bracket with my XTR crank that was intended to go with a 107mm).
Here's a look at my setup: