Make a Prestashop modul - ps_searchbar override

I have a category for our "discontinued products" I would like a modul that makes a override to the ps_searchbar, so by default it DOSEN't search products in the "discontinued" category. Also i want a check box or drop down, to select search also "discontinued products" I use this theme for my prestashop [login to view URL] Check box or drop down should look good and fit the design both desktop & mobile Start comment with "psearch"