I want some new designs for headers for our website

We have an established website which sells a small number of products, the main brand colour (a shade of yellow) can't change but I'm looking for some alternative designs for the header and menu of our website as I think it can be improved.

You don't need to code it, I'm just looking for some graphical options.

Please let me know how many options you think you would come up with and any other thoughts you have.