I looked up Model A1502 and it's a late 2013 13" Retina MacBook Pro. Is that what you have or is it something else? We need the exact specs before advising on which SSD can be used.
If that's the model you have, Other World Computing has replacement SSDs you can buy:
Upgrade the RAM and storage of nearly any Apple computer at MacSales.com. We also provide refurbished Macs, external storage, docks, accessories, and more!