Sounds like very low fluid, or a bad conductor plate to me.
You can order the dipstick from eBay :
Look here to order it, and get the measurements you requested :
https://www.ebay.com/itm/AUTOMATIC-T...-/282813794064

for the conductor plate :
https://www.ebay.com/sch/i.html?_fro...plate&_sacat=0