Here's some info on K-37 "Brakeman's Cabin's", "Passenger Unit's" and a plow.
AFE # 5145 11-30-33 Apply breakman's cabin on tender #495 $106.09.
AFE # 5183 12-31-34 Apply breakman's cabin on tender #491 $119.90.
AFE # 5355 6-20-35 Apply breakman's cabin on tender #492 $89.47.
AFE # 5699 12-31-36 Apply breakman's cabin on tender #495 $110.00.
AFE # 6302 12-31-37 Apply breakman's cabin on tender #493 $115.61.
AFE # T-6664 12-31-38 Apply breakman's cabin on tender #494 $138.47.
AFE 6077 7-10-37 Apply Steam Heat and Air Signal Equipment # 493 & 494 $239.78 each.
AFE # 5183 12-31-34 Construct and apply brakeman's cabin. #496 $114.42.
AFE # 5355 12-31-35 Apply breakman's cabin #498 $116.59.
AFE # 5643 5-31-36 Apply breakman's cabin #499 $127.51.
AFE # 6302 12-31-37 Apply breakman's cabin on Tender 497 $115.60.
AFE # 6077 7-10-37 Apply Steam Heat & Air Siginal Equipment #499.
AFE # 9634 11-30-42 Apply Pilot Plow # 499 $540.26.