Driver-side seat height adjustment | Aftermarket seats

The 453 Pure I recently purchased doesn't have driver seat height adjustment whereas the higher-level trims do.
I test drove a Passion model with height-adjustable seats and felt that I had more headroom with the seat fully down than I do now in my Pure. Does anyone know of a way to lower the driver seat further while retaining the seat rails?

Finding a height-adjustable 453 driver's seat in mint black condition from a Passion+ trim is proving to be difficult. I'm also interested if anyone has successfully swapped in aftermarket seats, and if so, I would love to see pictures.

Thanks!