Enter a piece of fabric, thrifted a while back and a pair of scissors!
I cut the white top open and then laid it on the fabric, along the bias grain, then cut out the pieces adding a seam allowance as I went. I added simple facings by laying the cut pieces on more fabric, stitching on the seam lines and then cutting them out. Not exactly technical, but effective! I even used french seams! It would have benefited from a little more length, and a bit more room across the bust, however I am pretty pleased with the attempt.