Reddit mentions of Vietnamese Rice Stick(vermicelli) Three Ladies Brand 2lbs

You can solve the problem by parboiling the noodles, or basically cooking them half-way. You'll basically want to stop cooking them 2 minutes prior to what the package suggests. Then drain, rinse, and then let them sit in ice water for a few minutes to stop the cooking process. They'll be flexible enough fit in the jar, but not so cooked that they become mushy and sticky. The rinse step is especially helpful here because you'll be washing off a lot of the gluten on the surface of the noodles which make them tend to stick together. I like to use this brand/thickness because in my experimenting they tended to be the most al dente and non-sticky on the second day.

https://www.amazon.com/Vietnamese-Stick-vermicelli-Three-Ladies/dp/B00ADHM9WW/ref=pd_ybh_a_99?_encoding=UTF8&psc=1&refRID=Q9RFSKZM16E2X2RT9159
I use these rice noodles and looked a home made seasoning which was:
2 tablespoons of poultry seasoning
2 tablespoons of garlic powder
2 tablespoons of onion powder
2 chicken flavored bouillon cubes or the powder(can be with beef flavor also)
1 one tablespoon of pepper.
I use the powdered bouillon and seal it all up in a small container
tried making it using chicken stock instead of water and it was pretty tasty.
may not be like ramen but I liked it for knock off gluten free ramen.
also they can be expensive and hard to find but a taste of thai have peanut noodles that are gluten free and pretty amazing.

Well, all the pho I've ever had used rice noodles (vermicelli)
Tons of different brands that are pretty much identical.
I usually go with the flat rice noodles:
https://www.amazon.com/Vietnamese-Stick-vermicelli-Three-Ladies/dp/B00ADHM9WW

(Usually way cheaper than 7$ on Amazon)
Most general grocery stores sell them for $2 per 16oz package.