<kuid2:44700:1:3> 36 in gauge Green Climax
<kuid2:44700:3:5> 36 in Gauge Black Climax Oil Fired
<kuid2:44700:5:5> 36 in gauge Black Climax Coal Fired
<kuid2:44700:56:4> 56 in gauge Black Climax Coal Fired
<kuid2:44700:561:4> 56 in Gauge Black Climax Oil Fired
<kuid:146153:10036> 36ng Superclimax V4
<kuid:648132:100035> 50 Ton Climax - Generic
<kuid:648132:100037> 36ng 50 Ton Climax - Generic
<kuid:648132:100046> 60 Ton Climax - Generic
<kuid:648132:100051> 70 Ton Climax - Generic
Don't know how close any of these match your locomotive
http://climaxlocomotives.com/confirmed/snsrch/?sn=684
Ah - Standard gauge 40 Ton. Wood Fired. Nothing that completely matches, no.
SG Climaxes
Best Candidate <kuid2:44700:56:4> 56 in gauge Black Climax Coal Fired by narrowgauge.
You could change the coal to wood with a texture change... It's a bit small though. I think it is a B-30 but don't quote me.
BTW there is a SG Decker available too.
Available as a locomotive (driveable), a scenery item, or as an industry for loading logs on cars.