Change Option Input Method on OC 1.5.4?

This may have come up before but I have searched and haven't found any extensions yet that can do this. For products options, 1.5.4 only lets us use the + and - modifiers to adjust the weight, price, cost and points in the Option section. Has anyone created an extension that changes the inputs so that we can just enter the actual values instead? For example, I have a product that has two sizes, 2 oz. and 4 oz. I'd like to be able to enter the actual weights and prices of these options rather than have to add to the base data values on the main product. I did just install the Options Modify Product Dimensions extensions which allows us to set dimensions on product options. This extension adds an = modifier so that we can type in the actual dimensions. Something similar to this functionality would work for the price, weight, cost, and points modifiers I would think. I appreciate any help you can give. Thanks!

I did find this extension http://zuma-design.com/custom-input-option by Zuma Design that appears to allow this functionality. It looks like it adds the = modifier for the price, weight, cost and points options. I'm waiting for a response from the developer to make sure it does what I expect. If anyone has any other solutions that do this, I'd still love to hear them. Thanks.

It turns out that Custom Input Option doesn't do exactly what I had expected. I did just find Option Values Equals Sign (https://www.opencart.com/index.php?rout ... n_id=20200) which DOES do what I need. Thanks.