Is it possible to customize the AvalonEdit search panel button icons?

Question

I need to customize the dropdown search panel to match my application but I can seem to figure out how. I am using C# WPF .net Framework 4.7.2

I have tried the below style but it does not recognize Search in AvalonEdit.

xmlns:search="clr-namespace:ICSharpCode.AvalonEdit.Search"
<Style TargetType="search:SearchPanel">

Image of options I have