Ah, here's the thing. if that cheap one you had in the 80s was Breville-branded, it was made by a completely different company than the Breville branded ones you can buy today. The originals (which you can still get in a number of territories outside the EU) are far superior to anything you can buy in the UK.
I give you Breville Australia's sandwich toasters: http://www.breville.com.au/cooking-a...ich-press.html
The Original '74 is basically the one I grew up with. Now I just need an excuse to go to Oz and buy one...