Hi I imagine you mean 'skins' here in b2evo. If they don't exist on the b2evo site https://skins.b2evolution.net/ then you will be looking for unsupported skins I imagine.

So what skins/templates do you want as it may be possible to create them.
It would be useful to show an image of what you want and detail the events you want from the ui.

I don't use joomla and wouldn't go there to understand what you could be talking about.

Update
A quick browse at hostandwindotcom shows me
/free-joomla-templates.html
/free-b2evolution-styles.html

so your request is to say the least a little vague