Broadway Limited Imports has been a champion in providing HO scale modelers with a breadth of fine steam locomotives. Herein is a listing of classes and road numbers released to date (may not be complete).
Road numbers in bold are in my personal collection (or on order).
Class E6s, 4-4-2 Atlantic
68, 89, 92, 198, 393, 460, 1211
Class H10s, 2-8-0 Consolidation
8014, 8022, 8259, 8304, 8421, 9422, 9915
Class I1sa, 2-10-0 Decapod
4243, 4249, 4258, 4262, 4268, 4291, 4301, 4304, 4308, 4324, 4326, 4336, 4352, 4372, 4378, 4383, 4390, 4394, 4398, 4414, 4440, 4447, 4467, 4471, 4473, 4499, 4524, 4538, 4572, 4578, 4587, 4591, 4595, 4616, 4626, 4637, 4664
Class J1 / J1a, 2-10-4 Texas
6156, 6163, 6165, 6170, 6173, 6410, 6418, 6432, 6438, 6444, 6470, 6488, 6492, 6493, 6498
Class K4s, 4-6-2 Pacific
8, 227, 623, 646, 920, 1139, 1329, 1361, 1453, 1533, 2032, 3681, 3683, 3739, 3740, 3751, 37681, 3846, 3849, 3856, 3858, 3880, 5041, 5341, 5343, 5346, 5351, 5356, 5365, 5366, 5385, 5393, 5418, 5432, 5435, 5451, 7279
1 Streamlined.
Class L1s, 2-8-2 Mikado
1159, 1319, 1343, 1429, 1682, 2359, 2911, 3053, 3273, 3483, 3648, 4152, 4268, 4471, 6255
Class M1a, 4-8-2 Mountain
6712, 6720, 6735, 6743, 6751, 6763, 6766, 6772, 6775, 6778, 6788, 6791, 6798
Class M1b, 4-8-2 Mountain
6702, 6704, 6716, 6733, 6738, 6744, 6749, 6755, 6758, 6761, 6762, 6794
Class Q2, 4-4-6-4
6131, 6175, 6180, 6182, 6187, 6191, 6195, 6198, 6199
Class S2, 6-8-6 Turbine
6200
Class T1, 4-4-4-4 Duplex
5501, 5502, 5503, 5505, 5506, 5511, 5513, 5515, 5516, 5517, 5519, 5520, 5526, 5528, 5533, 5536, 5538, 5539, 5541, 5548