If you read MangoWhirl's blog, then you might have noticed in this blog post, that I'm wearing a red/burgundy colour sleeveless blouse, which I left unbuttoned on the day. The top is actually jersey at the front and chiffon at the back, with lace inserts on the shoulders (which was covered mostly by my hijab).
Here are a few blouses that I've found online, but there are a lot more available, depending on what colours and styles you like. I personally prefer the sleeveless blouses with a lower drape at the back =)
New Look Rose Black Polka Blouse / Mango Chiffon Contrast Shirt / Dorothy Perkins Black Bird Long Sleeve Top
What do you think? Will you be trying this style with your abaya?