I can't recommend a new toaster but I can advise you that your statutory rights aren't affected just because you can't produce the receipt. Take the toaster back to the retailer and firmly state that you're of the opinion that the failure must have come about because of an 'inherent fault'. (That's a legal term, referring to something which was wrong with the toaster at the time of purchase, such as the use of poor quality components or poor workmanship). Challenge the retailer to suggest a more likely reason for the failure. If he's unable to do so, he's obliged to either repair or (more likely) replace the toaster.
Chris