True an unrelated male would be ideal. She certainly is pretty. It’s hard to tell color by pics alone, but this is the seller I recently bought from. This blue garter here had babies with another garter of the exact same color. I bought one of the babies. Not sure if he has any males left, or if this is the right color you would want. But very beautiful nonetheless. He has a lot of beautiful snakes for sale so maybe if this snake is the wrong shade of green he might still be able to find the kind you want. Wouldn’t hurt to ask.
https://www.morphmarket.com/us/c/rep...-snakes/396660