No spares, but I can tell you that all of the 125 forks are different to the 250/400D forks. The 125 forks of a similar age are 36mm and have less travel. By the time the 125 forks got to 38mm (125H), they had more travel than the 250D forks.
I'm pretty sure that 250/400E forks are visually the same as the D forks, but they have more travel (could be limited back, I suppose).
IT250/400D/E would be worth a look too.