Locomotives, Steam 7-1/2, 7-1/4" gauge

Catfish Hollow Toys
O.S. Live Steam Locomotives 3 1/2", 4  3/4", 5" and 7 1/2" gauges

Colorado Gandy Dancer
Custom parts & accessories for the Live Steam/Diesel hobby.

David Moore
David Moore sells high-quality castings and kits for 1.5-1.6" live steam models.

IKON Engineering Development LTD
Steam, Electric and Diesel locomotives and rolling stock up to 750mm gauge

Jim Vass Miniature Locomotives
5" and 7-1/4" gauge English locomotives

Knightley Light Railway
Petrol or diesel hydraulic models of steam locomotives, British or US.

Little Engines

Locoparts.net
New Finished 2-6-0 Moguls ready to run.

Mammoth Locomotive Works
7 1/2 to 24" gauge "diesels"

Mason's Trains Ltd.
7-1/4 and 7-1/2" gauge live steam locomotives, cars and parts.  
G scale and Steam Models of Distinction.  Makers of live steam trains . 8 models in 5 scales.

Maxitrak Ltd
Kit locomotives in 1" ,2" & 2-1/2" scales in 4-3/4", 5",7-!/4" and 7-1/2" gauges. British, American and European prototypes (road and rail).

Model Engineering Supplies PTY LTD
gauge 1 to 7 ¼ gauge, Australia

OS Live Steam Locomotive
3 1/2,  5,  7 1/2" Steam Locomotive kits

Precision locomotive castings

Railroad Supply Inc. 
1 1/2" scale 0-4-0 Switcher, 0-4-0-T, 4-4-0 American, 2-6-0 Mogul, and 2-8-0 Consolidation

Rio Pecos Garden Railway Co.
3 1/2 to 7 1/2" gauge Steam Locomotives.

Roanoke

Roger Goldmann Live Steam Locomotives
Precision 7-1/4" & 7-1/2" gauge locomotives. UP 4-6-6-4 Challenger, UP 4-8-8-4 Big Boy. Rough & machined castings. Chassis-on-air models: USRA 4-6-2 Pacific, 280 Consolidation & USRA Switch Engine.

Roll Models, Inc.
2-6-0, 2-4-2, 2-4-4  3.75" scale, 7-1/2" gauge. 

Southern Steam Works
Parts, Original Equipment Manufactures and After-market

S.T.E.A.M.
Locomotives 1.5" scale (7 1/2" gauge)