Is there any possibility of a family member or friend lending you the money? - it's not 'that' much in the grand scheme of things. Failing that how about getting in touch with your IP asking if poss for one payment break [if that will cover it] and spreading the cost over the remaining 6 or so monthly payments? I know wjhat you mean that it's hard, of course it is, but you are so close now, so c'mon, head up - there will be some weay round it. Also Get a second quote on the car - it might come in cheaper.
Last monthly payment made 3 June 2013 after 6 long years. CC issued 21 August 2013, but, er, lost in the post. Finally got it 17 September.