model locomotive dimensions index?

[NW Modeling List]

I'm posting this to any group of which I am a member, and which I think 
might have someone out there who would know the answer, so please 
forgive any multiple posts you may receive.

There is an online index of 45mm gauge locomotive chassis, listing wheel 
diameter, spacing, wheelbase, photos, and any pertinent information 
about almost all the commonly available models, at least here in the US. 
  It can be found at 
http://gold.mylargescale.com/scottychaos/MLS-kitbashing-guide.html

Is there anything comparable for any of the smaller scales?  I'm 
especially interested in HO for my own purposes.  The reason I ask is 
that last night I found myself wondering if there might be a 
commercially available chassis suitable for an N&W class M, with 56" 
drivers.  It turns out that it's rather hard to find out for sure.  I 
did find that Bowser makes a 56" driver, but only in an 0-6-0 chassis. 
It would sure be nice if I could simply scan a list of available 
locomotives, looking for one that would fit my needs.

So how about it?  Anybody ever heard of anything that would fit the bill?
-- 
Kenneth Rickman - krickman1 at carolina.rr.com
Salisbury, NC

If at first you don't succeed, use a bigger hammer!