Utilizator Kemono Neck Extender?

[MikaPuppy Auxifur]

I wear a different head with the Kemono body and my neck looks fine when I'm standing, theres just a lil weird invisible space but not really noticeable if you aren't looking closely, but whenever I sit and the sitting animation has me extending my head abit there is a big invisible space; I tried finding a neck extender and there was a link for one called 'Kemono Neck Extender Z' but I guess the creator closed their shop because it just takes me to the marketplace home page. Is there any way to fix this without a neck extender? I'm pretty inexperienced with modding, I've only done the very very basic stuff. 

[Skell Dagger]

Would this possibly work for you?

https://marketplace.secondlife.com/p/OS-Omega-Neck-Fix-Demo/9437064

Worth trying the demo, perhaps.