S60 space saver and jack
 

Hi All
Got my 1st volvo on monday. It's a 2011 s60 d3 se lux, love it!
Just joined up and I am pretty green with forums so apologies if I've put this in the wrong place.
I am after a space save wheel and jack (feel uncomfortable with an just a can of something in the boot). I assume I need something that doesn't make the whole thing wonky if I put it on with three 235/45/17's ?
I know I could go to volvo direct but guessing there are slightly less expensive options available?
Any advice appreciated, thanks.