I think it will be very difficult without seeing the painting in hand. How about a photo of the back of the canvas in close up, a photo of any stickers and notes on the back. A photo that shows a corner detail of the frame, stretcher with canvas close enough to see the weave of the canvas.
If I can at least accurately date this thing it will make narrowing down the artist much easier. If I can do it and frankly I don't think it will be easy in light of the thousands of artists working, I would rather you make a donation of art supplies to a school or Boys and Girls club.
I went back over the painting and I don't think we'll find that painter. I really think its illustration art or painted specifically for the decorator market. Its done well enough and the quality of the paint itself shows that this is an experienced painter, but the pine trees closest and on the left just don't have the 'touch' I'd like to see. And, again, the subject and the painting style are very romantically executed.