The Fuji Rod Guide BLROG 8mm will suit most threadline and baitcaster rods, so the next time you damage one and need a replacement, get yourself down to your local BCF store and get one. While you are there you should also pick up some Fuji rod thread and varnish.
Thread comes in a 100-metre spool and it is ideal for under and over binding the guides onto your rod. If you accidentally break a guide on your rod, all you need to do is get a spool of thread, a new guide and some rod varnish and fix it up. You will be back out on the water in no time!