Pretty much any mod that has GUI in its name or description should fit your needs. So I suggest you make a search for that term. They took good care to show a calibrated vertical and horizontal scale (on the glass) in the periscope. And I don't mean the bearing ribbon at the top. They (often) provide a circular sliderule around it named the Range and AOB Finder (RAOBF) to do the measurements you mentioned. Way back I figured out some trick to make the speed calculation and zoom-corrections on it dead-simple and it is incorporated as a scratchmark on the scales in pretty much every one of them.
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