You can get the tips here. The product numbers used matches the same numbers used by JBC for the tips they are aping, minus the hypen. Store (Wozniak Store) is great. Shipped fast and has a high rating to match.
https://www.aliexpress.us/item/225580...

Spoon: C245-931 (JBC C245931)
Through-Hole: C245-785 (JBC C245785)
Bent Conical: C245-030 (JBC C245030)

As I showed, they come in cardboard packages like the real JBC ones nowadays. These have nice heft, unlike the C245 tip that came with the Aixun T3a, which coincidentally, only last 2 seconds. From initial observation, I think these are fantastic for the price.