I just came across the free plug-in from Valhalla called Freq Echo which, after only a little bit of play time, seems to be quite capable of CWO/COW like effects.
I mean, it’s all there, Freq Shift, Delay, Feedback and then some.
TE threw some extras in on this like an underlying pumping compression ( I think?) so it’s not like EXACTLY the cow, but I guess I just hadn’t really ever come across anything like it so I figured I’d share.
If you don’t know, now you know!