Hydraulic or Mechanical?
Guessing you have mechanical as a single sided piston, as in only one piston normally on the LHS of the caliper only, with the RHS being fixed.
If Mechanical there's not a lot of options, there is this Rever MXC1,
Unboxed & Weighed: Rever MCX1 dual piston mechanical disc brakes ? plus first ride impressions which looks to be very similar to the TRP Spyre road brake; that's about it.