According to BikePedia, these did not come stock on the Bianchi Eros in either 1996 or 1997. Since this bike came stock with Mirage level components, you're probably looking at a low - mid level quality OEM rim. Fir is/was a good brand, as is Ambrosio (which came stock on this bike). Finding a rim from Velocity or Alex Rims or Mavic just to name a few common manufacturers will provide you with a quality alternative that is affordable and readily available today.
To match the style, you are going to want to get a low profile or "box" style rim as opposed to a deep profile or "aero" rim. All of these companies and more have a style of rim like this.
You will definitely need to purchase new spokes and nipples for this, so make sure you know how to purchase the proper size.