We have some new products that have no weights entered in the database yet. What we'd like to do is have a notice displayed for any product with zero weight saying that shipping will have to be calculated after the order is placed or over the phone for these products. I know it's a crude solution, but we have a bunch of zero weight parts that can't be updated quickly. Doing something like this would be better than nothing. Any ideas how to implement this?

We use only UPS shipping and calculated based on weight.