Adele Cardigan | crochet pattern by Jenny King (link to Ravelry) Lace wrap cardigan in sizes 10 - 18, can be wrapped and tied in different ways (back, side, or front). Note: written in UK crochet terminology.
Jessica Tromp's tutorials for making your own crochet bolero are a good starting point; you will be able to design a bolero made to your measurements. Please note that these are not straightforward "plug-and-play" patterns in the way a lot of North Americans are used to.
Learn Plus-Size Crochet Techniques with Marly Bird | On
Curvy Crochet class on Craftsy.com with Marly Bird "Learn how to make beautiful crocheted garments that fit right and look great. Plus-sized or petite, you'll learn lots of useful techniques." This is a great class no matter what your size - if you want to learn how to make a crochet garment that really fits YOU, this is good stuff!