There is a painting called "Lost" by an artist called "S. Lee". I
would like to know if this artist has any more paintings and where
they can be bought.

The painting "Lost" is of a Blonde girl sitting on the floor of a room
with a rug wrapped around her (You can't see her face). She is facing
an open door where the sun is shining in.

I bought this painting in a suburn of Sydney called Glebe.

Perhaps you can find the gallery on this site and ask:
http://www.totaltravel.com.au/travel/nsw/sydneyarea/innerwestsydney/directory/artgalleries

Thanks for that. I will have a look and go from there.