What you are looking for is a high end guitar sampler. There are a lot of good acoustic and electric samplers coming out for strumming and picking and they are getting better by the day.

Realistic-sounding "lead" samples are just not possible, though, I don't think, because so much goes into a good acoustic or electric lead in terms of how aggressive or light you are with your touch, etc., whether you use vibrato, bends and so forth. It becomes an expression of the artist's soul. That is hard to program.

A good acoustic lead does not have to be fancy. Eric Clapton doesn't actually play a lot of notes in one of his leads, it is all about HOW he plays them.

For acoustic leads, if you can play, I would encourage to simply practice an hour a day and learn how to do it yourself. Primarily, because it is fun and it will make you feel good.

David Snyder
Songwriter/Renaissance Man
Studio + Fingers

https://davidsnydersongs.com/
https://spoti.fi/359Gigs
www.davidsnydermusic.com/
www.reverbnation.com/davidpsnyder
www.soundcloud.com/davidsnyderchannel
https://www.songtradr.com/user/profile/david.snyder