I think Isuzu is much closer, with her hair color, clothes and such. Although there was already one made.
I'm waiting on a Hesta,Isuzu and Miku mix.
You're right, but I'm actually thinking more about Iku's personality and body type. Usually she's seen as an oppai loli, same with Hestia.
If you combine Iku and Isuzu, you pretty much get Hestia. :p Mesh their clothes together (think about it), mesh their personalities together (kind of?), Isuzu's hair style, Iku's body type... yup, I think so.