XF 1.3 Custom search bar including admin selected prefix

Hey guys, quite new around here, I remembered an old licence I had so am working on SellFree.co.nz I am not using the original template, if you have a look at the page you can see that with the template im using, the search bar is at the top of the page and looks quite nice in my opinion, but as my website is working toward being classifieds posts based I was wondering if it would be possible to add a prefix that i have set up (Location) to the search bar and maybe a bit more styling, say nice search button and longer text entry area plus the previously mentioned prefix select at the start of the bar.

Thanks for any help regarding this, I welcome ideas and quotes to my inbox too, but would rather work toward my goal with suggestions, cheers.