Sailor Yama-dori is a blue-leaning teal and there are several good alternatives. These include P.I. tsuki-yo and Diamine Eau de Nil. Waterman Mysterious Blue is a reasonable alternative.
Robert Oster Fire and Ice is a quite saturated blue rather than a blue leaning teal. I haven't tried Sailor Manyo Yomogi but it looks like it might be a reasonable alternative if that's available where you are,
Here are some swatches so that you can see what some different but similar inks look like:
Teal swabs.jpg
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