I agree with Jerry! My career depended on the quality of the precision tools I used and no one touched those tools but me.
You might also stop in a couple pawn shops to get what you need. Just make sure the indicator strokes nice and smooth and goes back to zero every time.

Don

1967 GMC 9500 Fire Ladder Truck
"The Flag Pole"
In the Stovebolt Gallery
1946 2-Ton grain truck
1946 3/4-ton pickup,
1953 1-ton pickup
1957 1-ton flatbed dually,
1954 Pontiac Straight Eight
Of all the things I've lost in my life, I miss my mind the most!