You may get more results on the Nishiki if you search under Alpha and Beta. While they were part of the Cunningham designed NFS (Need For Speed) series, many owners simply call them an Alpha or Beta. The NFS Altron was the dedicated triathlon bicycle but the angles were standard road geometry.

650C is a viable alternative if you want lighter and more responsive wheels without the higher maintenance and cost of tubulars. However, the tyre selection is far more limited than 700C.