[Reece]

You should be able to do this taking a little care and ingenuity. The dealer that I referenced has I believe a $25 minimum which is a lot if all you want is a surround worth a couple of bucks. You could modify one of their surrounds to fit your speaker. Or, I used to re-surround speakers using 1/4" "hobby" foam, cutting my own surround "donuts." You'd want to be careful not to get any debris down inside the voice coil area while working: your speaker has no dust cover there. You could cut a round piece of black felt (fabric store) an inch or so in diameter and glue there first. Get fabric glue while you're there: similar to white glue but stays a little flexible and is waterproof as it's meant to glue patches on clothes that will be washed. When glueing on a surround, I used to glue it onto the cone first and then next day glue the outer part to the speaker frame, all the while making sure that I was not bending the cone to make the voice coil rub on the magnet pole piece. One way to do that is to play a radio low through the speaker while you're working on it and listen to be sure there's no rubbing distortion. Hold down the outer edge of foam with bunches of clothes pins to dry.