Customize/improve a Woocommerce plugin

Currently I'm using [login to view URL] for showing colors and sizes in Woocommerce product detail page. Here you can see the demo: [login to view URL] Currently when clicking a color and connected size(s) the other colors getting a big cross, that means the other colors are not available/not clickable. To choose another color you first need to click again on the same size to deactivate the size, started from that point all the colors will be back available. This is what I need: - Colors and sizes should not be able to deactivate/unclick it. When clicking again on the same color and size than nothing should happen because the color/size is already active. So in this case there should be no cross at all. - When clicking another color, than the available sizes should be visible and the sizes that are not connected to that specific color will be greyed out, just like the current function of the plugin. When clicking another color, than the new sizes will be available. - Each size should show a price under it, just like this example: [login to view URL] - Colors and sizes should looking the same (same css style) like: [login to view URL]