get rid of your spare, who really needs one anyway?
if you can be bothered you can swiss cheese the front and rear bars, as standard they are so solid that an impact usually bends the chassis or quarters anyway so hole sawing them will probably give you more protection in a small acco ie. the bar will break first
not that it would make too much of a difference but you ccould piss the window washer gear off i know i never use mine.