£15.60 to spare and want a wire 11m antenna well here is one for you. Details are that it is 500w rated, length of 5.5m and has an SO239 connection in the middle and SWR of 1:5:1 on the CB Radio (Guess Mid-Band) and is secured at both ends by dog bone insulators.
Photo: (c) StanislavPalo
Check ebay for more selections from this antenna maker. I have a couple here for 2m/70cm and PMR and can say they are working really quite well for me.