Modeling the Southern Pacific in the 1960's-1980's
New Haven I-5 wrote: Does any company make this 2-10-4??
Not currently. LMB imported a T&P 2-10-4 in the 60's/70's and I believe Westside did one in the 70's.
There's a Sunset brass model up for sale on Ebay if you're willing to pay almost $1,000.
I don't think West Side ever did one, and I don't have my Brown Book handy, but IIRC, the model was only done by LMB and Sunset. That $1,000 for the Sunset model is on the high side for this model - I have one, and it's a good runner, done by Samhongsa, but it prefers 30" radius curves at a minimum. It's not impossible to find them from $495, but the best way is probably to search around the online brass importers - Dan's Train Depot, Caboose Hobbies, and The Caboose are all reliable. Look for it under "Texas & Pacific" - I've never seen a dealer list it under the "Southern" before (unlike the C&O 2716, which Key actually produced in an as-for-excursion-service variant), although the prototype was a beauty in green and gold. Here's a link to one that Caboose has now - they want $795 (http://www.caboosehobbies.com/catalog/product_info.php?manufacturers_id=&products_id=68675)
Someone - Division Point, maybe? - imported them a year or two ago, and Uncle Dave's Brass (google for their contact info) had them - there were a range of T&P variants plus the CGW engine, which was almost identical save for some fixtures like the feedwater heater. Those are extremely expense, though - $1,500 range.
There are kits that could be the basis for a conversion - although a lot of the plastic 2-10-4s that are on the market would probably be unsatisfactory, since their prototypes (I'm thinking of the C&O T-1 and Pennsy J-1s) had 69-70" drivers, and the T&P engines had 63" drivers. You might find a Bowser USRA 2-10-2 or Pennsy I-1 chassis would provide you with a basis for a conversion - the wheels will be within a scale inch or two, and are probably spaced about right. But you would need a lot of detail parts, some modification of the chassis, and you would have to scratchbuild the boiler and cab assembly.
The first volume of MR's "Steam Locomotive Cyclopedia" has a set of plans for the T&P 2-10-4, btw.