Crochet sweater coat

I don’t know where you’ve looked already but here are couple of patterns and also some sites to try.

http://planetpurl.com/planetpurl/patterndetail.htm?mode=search&patternname=crochet-belted-jacket-with-moda-dea-tweedle-dee--crocheted-ladies-jacket-pattern-by-coats-and-clark

Also, allfreecrochet has some patterns for jackets and coats
http://www.allfreecrochet.com/Cardigans-and-Wrap-Sweaters
Try lionbrand and also