Tamiya have an Otto Carius Mid Tiger also, but I believe it was a limited edition? In any case, it does not have the unusual features that made his Tiger different from its comrades.
This item beside Tiger F13 appears to be a wheel hub. It appears in 2 photos.
The “rubber” wheel set included some hubs that look very similar to it. The “steel” wheel set has no part that looks like it.
David