These swing jackets are so very cute as well as so very popular right now. I absolutely adore the one you have posted a pic of!
I would definitely take unlevkirby's advice as I have done this and am so happy with the results. I am currently taking advanced patternmaking at my local community college. And it's true, you CAN design and make whatever you want!
But if you don't have the time to do that, or just don't want to I might suggest McCall Pattern 5479, 5480. They aren't exactly copies, but if you can figure out how to modify them you'll get what you want. Also they are swing jackets nonetheless, so if you don't feel like doing the mods, you could definitely still have a cute swing jacket. I also just received the current issue of Burda Easy Fashion and they have a similar jacket pattern in the magazine. http://www.burdamode.com/Jacken_und_M%C3%A4ntel,1270777-1541023-1541024-1541138-1541139,deDE.html
It's in German, but if you know how to sew pretty well, I'm sure you could figure out how to put it together yourself. I bought my subscription from GLPnews, but you may be able to find the magazine on eBay.
Hope you find what you are looking for!