If you really want to splurge, Wing Wetsuits will make a custom side entry jacket built to her specific measurements. They have a variety of colors to choose from and the vests are fantastic! I believe they are Australian CGA, which is essentially the same as US, with the exception of only one buckle at the waist as opposed to two. Check out their website and it gives all of the details of how to go about ordering, measuring, etc. I have one and
I absolutely love it!
The company is owned by Amber Wing's family. They are fantastic people and happy to help in any way. They do carry a couple of models of stock vests, which may work for your wife as well. They can let you know what will fit best and if custom is the way to go. You can reach them by email through their website,
www.wing.com.au