Bremmer Kraft BR08 are similar to those Rohana wheels in terms of style, though they are not nearly as concave. Enkei also makes some similar wheel styles, but again, because of our weirdo offsets we can't get anything with decent concavity on our cars.
OZ Alleggerita and Formula styles are also close in terms of the spoke style and are a bit more expensive / nicer than the Enkei and Bremmer Kraft, though not nearly as expensive as custom wheels.
BR08
OZ Formula HLT
and the RC10 for comparison