If you don’t want to splurge, your best bet is this Vest. It's a fantastic product, while not very expensive. Another wonderful option is this Topshop Sleeveless Blazer. While the price is competitive, be sure that this item will become a worthy addition to your wardrobe. Or you can opt for this Nine West Sleeveless Jacket. This item has all the potential to become a powerful player in your wardrobe.
If you want to splurge on a luxury piece, then what you're looking for is this ADAM by Adam Lippes Vest. It's more expensive but worth your money. While you're at it, also have a look at this Thakoon Blazer Vest. Yes, this item is expensive, but it does not mean it's not worth it.