I have try with a Fleshlight trim without head, I keep just the tube :
I put it in freeze bag for put easyli, sexe is nice.
But Fleshlight is expensive, and not real inside, juste a sinple cylinder. I use here the standard, I don't like the other (tight version, girl, bump....), but if you want use other as the Alien of you had like AVATAR : http://www.fleshlight-international.eu/alien/
I have try with the "Woman's Smell":
It is the best I found for my TB, but here problem it is too big, sexe can't enter, too hard.
So I have search a insert more smooth, and more small, for that sexe can enter easyli. I have found this insert :https://www.toydemon.com/Clone_Meiki_Meguru_Kosaka.htmlhttps://www.toydemon.com/Sexy_School_-_Honoka.html
I will buy this insert and try, and trim if necessary.