Hickok 6000a meter issue

[mbates14]

I got a hickok 6000a that works for the most part. but the meter i think is bad.

Its supposed to be a 100ua meter, but it is taking 342ua to deflect the meter fully.

Because of this, its throwing everything off. cant bring line test into calibration, all micromhos readings are super low, the list goes on.

Any way to recalibrate for this high of a uA? or where to obtain a replacement meter?