Here's your best bet:
These are from the 1980s era remakes of the postwar Berkshire that came in a variety of road names (UP and Southern among others). This tender is from the Great Northern 4-8-4 version. The others were 2-8-4s. I think they also came on the Nickel Plate Berkshire and many other Lionel engines in following years.
Same wheelbase as the original 2671W tender but more detail:
The longer wheelbase scale Hudson tender has a 1/4" longer wheelbase between outside axles:
It might make the coupler extend out too far for a nice appearance.
By the way, Williams used an identical truck side frame on their semi scale N&W J and many, many other engines, but with a little less crispness in the detail:
A little hunting on the auction sites will eventually get you a pair of used trucks (Lionel or Williams). You might have to buy a whole used tender, but the price for a basket case might actually be less than new trucks. The odds are good since they came on the tenders of so many different engines.
It will still take some patience, but you will eventually find them!
Jim