38mm Yammie forks came on lots of things. IT175J/K, YZ250/400/465D~G, YZ125H~K, and at least some IT250/465 (not sure when the bigger ITs went to 38mm forks, but they were 43mm on the K model).
But be aware that they all have the angled lug for the backing plate, while most TLS backing plates are the horizontal lug type.