Is there anything out there or forks of this?
Just out of curiosity, what is the context for wanting to do this? To implement
SECP112R1 instead of
SECP256k1 in kangaroo code, you would have to adjust the specific parameters of the curve and adapt the equation.
Despite the different parameters and equations, you shouldn't have much trouble adapting
SECP256k1 code to
SECP112R1 because they share many similarities. The core principles of
ECC remain the same, so most of your existing logic for point addition, scalar multiplication, and other operations can be reused.