Chastity device discussions and reviews discussion

Has anyone tried these out? Lady Gaga recently stunned crowds by sporting dildo heels, which sparked some thoughts in my mind. Although I’m currently ‘self-locking’ (not the ideal scenario since my wife hasn’t fully embraced the keyholder concept yet), we had a steamy fantasy discussion lately where it became clear she gets turned on imagining me kneeling with my head down and rear completely exposed before her chair while she probes me with a heel, ideally one shaped like a dildo. Are they available in the UK? Do you get detachable heels that come in different sizes or are they fixed? I’m sure wearing them feels very submissive, and I really want to please her as we continue this journey.