Clit vibrators for “ride on” toy mounts?

The Sybian, Motorbunny, and other similar ride on machines seem to use a raised platform of sorts – with or without a dildo – that buzzes and vibrates, onto which the clit is pressed onto.

We have two “ride on” toy mounts from Liberator that we use with her dildos – but there’s no “hands free” clit stimulation.

Is there a toy that’s meant to be used like this? I’m picturing the base of a typical dildo, which is used to attach the device to the toy mount, then a narrow platform of sorts with a slighty raised area for her to grind/ride her clit into.

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