I've been using the Nashbar TFX saddle on my mountain bike for a few years and really love it. The specs on the saddle are 153mm x 280 mm. I wanted to order another TFX saddle for my road bike, but it is no longer offered by Nashbar. I have no idea who makes the saddle for Nashbar.

I looked at various online sites (Performance, AE Bike, etc.), but they don't always list the specs and it is hard to tell much from a picture.

Does anyone have recommendations for finding an equivalent saddle? Take the old saddle to a bike shop?

Thank you.