Dip sticks are a pain in the butt, I've actully cut a washer looking gasget out of a thin wall inner tube before and used that with a slightly worn dip stick tube.
It sealed up good and never leaked.
It got a problem right now with the after market dip stick that came with my Canton 8 qt. oil pan. Instead of putting a threaded nut at a angle so the stick can go down in to the oil they put the threaded nut straite out of the side so the dip stick goes straite in side ways. Stupid Design!!! I tried to used the factory dip stick on the front of the motor but that hits the windage tray screen and won't go thru. So I now have to take the pan off and drill the screen so the engine wiil except the stock dip stick.
I spent about $700 bucks on the set up and they can't make a dip stick that works with thier pan. Kurt