I need an extension or modification to OpenCart that would allow specific products to have a special shipping charge.
I ship hazardous materials and it requires an additional fee per package. The fee is static, so the extension/mod would only need to add a fee to the total order. The fee should not stack, and only be applied to a specific category of products.
For instance; Product A totals to $30 shipped, but because it's hazmat, it requires an additional $24 to ship. I need the mod to add a flate rate fee of $24 to that order, no matter how many products are ordered.