the shigematsu rx01 (left; that cyberpunk-looking elastomeric i kept eyeing) is probably being discontinued; if you're in europe and still want one, they are currently still being sold here:
https://www.klimafil.cz/en/half-mask-sts-shigematsu-rx01/
the new model that replaces it, the rs01sd (right), still offers the likely high quality voice diaphragm (i've been surprised with how well the one on my cf01 works before so i'd hope these are similar) but the new design feels a lot more understated (this may actually be a plus to some) and likely can't be adapted for source control as "easily" as the rx01 (it relies on a 3d-printed adapter, it's not something that they sell afaict, but it is possible). also the two retailers i've found to sell it in europe are 1: only shipping within norway, and 2: claiming to ship to all of europe but they ask for a spanish id at checkout
