Hi Dave, although I have not heard a guitar VSTi that sound real, check my avatar to see why, but I did a google search for “guitar VSTi” and there are quite a few free ones here.

I have read that there are a number of good sounding ones for Kontakt such as these and these
However they can be on the more expensive side.

A less expensive one here
has received good reviews.

Also Kontakt comes with some guitar sounds. Have you tried them?

Since I do not know how you will be using these guitar sounds I can not help you with that. However I will say that if you expect to take a BiaB generated midi file, drop it into FL Studio, pick a new VSTi and think it will sound more like a real guitar you are in for a big disappointment. You will need to greatly modify any Midi guitar file to even come close. You will need to use the pitch bend (vibrato, slurs, pre-bends and bend, slides, detuning, etc.), the mod wheel (tremolo, etc), configurable fader and/or knobs (hammer ons, pull offs, legato playing etc). It will take a lot of editing to achieve that almost real sound and I haven’t even gotten into cabinet choices and effects as they also are needed.

I don’t know what you are using for midi input but if you don’t have a midi controller keyboard with assignable knobs and faders you will have to input/draw the data in the piano roll view.. I use one like this model .

I hope this helps.

I phoned my wife and asked her if she wanted me to pickup fish and chips on the way home.
She just grunted.
She still regrets me naming the twins.

64 bit Win 11 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware