Local retailers don’t seem to want to stock anything anymore. I’d suggest a motorcycle shop to find Noleen products. Bike shops would be another option for other seal greases.
Thank you for the photo of the SRAM Butter. Looks similar to petroleum jelly.
There are tons of seal greases out there for bicycles, motorcycles, etc. I’m sure most would work fine for RC.
Yer welcome J and this was recommended by a friend that owns one of the local bike shops "thumbsup" ... they also rc (bashers) "thumbsup"