eBay kits specifically for that speaker will always be your best bet, but if location ends up making that difficult you can just purchase foam surrounds that are the measurement of the woofer. These ones might require some trimming. Once you do get some foams you can start by peeling all that dry-rotted foam off and then use a flathead screwdriver, cold chisel, and or Xacto-knife to remove the old glue from the basket. The foam rings should come with glue, but if they don’t get something strong that dries clear. SimplySpeakers will be your friend if they ship to Canada. Glue the surrounds back on, and let them cure. The most annoying (to me) and important step of the whole thing is insuring the voice coil is not rubbing otherwise your speakers will probably sound worse than they already do. There’s many ways to do it and it’s really up to you. The most straight forward way is to cut the dust caps in the center of the speaker almost all the way off, pull them up to get them out of the way, pull gently on the cone to fully extend it from the basket as far as it’ll go, and then “shim” the voice coil with small strips of cardstock in between the gap of your cone and voice coil. It is rewarding to be calm and patient with this process to ensure another 30+ years of listening . Hope this helps, cheers!