Looks like Curry's stock Corsair PSUs - the CX series at least. For a 960 a CX500 or a CX600 would be ideal. They've got the CX600 on sale for £50. http://www.currys.co.uk/gbuk/search-keywords/xx_xx_xx_xx_xx/corsair+cx/xx-criteria.html maybe you can go into your local Curry's/PC World tomorrow and grab one (if they are open on a Sunday?)This is no time for wisdom, I learnt life sucks. =)
Or you can go on Amazon or Novatech or Overclockers or something and order a CX500M or CX600M (the M units are the modular ones, they're better) and get it delivered next day.