Alternative air filters - sport 1200 in this case

I am looking to see if there are any good air filters out there, some of the other forums are recommending that you steer clear of K&N, the reason for this is that the airbox design and filter flow. So an alternative paper one would be good [price depending] but so far not found anything online that matches the size apart from a BMC FM28006 or 280/6 [don’t know price].

Does anyone know if Pipercross filters [MPX106] are better than K&N?

I would try Todd Eagan at guzzitech he does a variety of parts sourced from around the world including different air filters for CARC models ( I supply him with all the stainless steel rocker cover bolts )