The Toseek (e.g. https://www.aliexpress.com/item/32875665589.html, also frequently found on ebay and amazon) works well if you sit over the centre of the clamp, although some people have issues with the pitch angle moving due to sitting on the nose of the saddle, so it's worth considering how you're going to use it.
The Toseek (e.g. https://www.aliexpress.com/item/32875665589.html, also frequently found on ebay and amazon) works well if you sit over the centre of the clamp, although some people have issues with the pitch angle moving due to sitting on the nose of the saddle, so it's worth considering how you're going to use it.