Yes there is, but Im not telling you where to find it because that would encourage you ro use it. Horrible, horrible BASIC variant

Seriously though, yes there is, but Im not sure what the archive is called. Im pretty sure its on aminet though.
Just curious, but is there any reason you want to use Amiga BASIC vs. any one of a number of good BASIC versions the Amiga has? AMOS, Blitz Basic, Hisoft Basic are much, much better options. If memory serves me correctly Hisoft BASIC is even Amiga BASIC (and quick basic) compatible.