This question is about current multiplier/divider ICs The OP asks if there are existing ICs that can be used to mirror a current with a fixed ratio, different than 1:1.
In the comments to Steven's answer, he's explained that he needs to measure a current, and the problem can be solved with a current sense amplifier. Though, there are other questions about that, while the original one is more (sorry for that) original.
Should we keep it and make the answers scoped? Or should we modify it to the real problem, making it a possible duplicate?