What are the options for something lightweight and cheep?

Aligator and Clarks only seem to be stocked in 160mm and 180mm sizes and from past experience 180mm shimano disks didn’t line up with a 185mm calliper properly.

Failing that, has anyone run Avid Elixirs with 180mm rotors and lived/not worn their pads down funny?

Anyone I need some new discs for my hope mini’s they are 165mm but only hope appear to sell that size at twice the price of othere brands