Unknown Locomotive

I just brought a $40 N-scale locomotive at Model Train Classics in Eau Claire Wi. The locomotive is extremely detailed. But the only problem is I could not find out who made it. The locomotive did not come in a box and had no manufactor markings on the bottom. The only reason I am really concerned is in the case that I need customet service/ parts. The locomotive is an EMD SD40T-2 lettered for the St Louis Southwestern (Cotton Belt) No. 8374 in N Scale.

Thanks for any answers in advance.

I searched ebay for an N scale SD 40 8374

https://www.ebay.com/itm/N-Scale-Intermountain-Locomotive-SD40T-2-SP-Cotton-Belt-69408-05-DCC-Ready/163138031185?hash=item25fbc8ce51:g:GE4AAOSwhztbGcra

Intermountain is the only company to make an N scale SD40T-2.

http://www.spookshow.net/loco/imsdt.html