Update on my search for the gauge.
Using Tom's Amazon link I was able to find the correct screw on gauge P/N - G-12845. After more investigation I was able to purchase one on E-bay for $54.00 with free shipping. Once again thanks for the help, this group is great!
https://www.amazon.com/Manchester-5628S02537-Screw-Propane-Sender/dp/B00EP1R2AG/ref=sr_1_32?crid=288LAN6NSSDV2&keywords=manchester+propane+tank&qid=1698157621&sprefix=manchester+propane+tank+gauge%2Caps%2C323&sr=8-32&ufe=app_do%3Aamzn1.fos.006c50ae-5d4c-4777-9bc0-4513d670b6bc
