Bit confused by the blurb posted, photo looks to be of the standard quick fit not the pro which supports anti sub strap and has a different buckle.
This one? (https://www.schrothracing.com/products/quickfit#3366)
If so it'll fit the 9n polo and should fit my 9n3.
If it's $400 for the pair shipped I'll double check the mount points tonight to confirm it'll fit. If it will I'll take em.