We have a nice used AP Racing brake caliper available for sale. It has 1.125" pistons and fits .810" rotors.
It looks to be in good used condition.
Please see the photos and decide if it's right for you.
Lightweight, two-piece forged aluminum alloy body.
Stainless steel pistons.
High temperature, low drag seals.
Integral bleed screw and pipe protection.
Stainless Steel wear plate & pad abutments.