I had a new Sifab (Mulfab) radiator fitted last month. The previous radiator I assume was from new, but had started to sprout a core leak last year.
I should point out that although SiFab and Mulfab radiators are outwardly similar (I did work with Peter for 6 years and made approaching 800 radiators in that time..), SiFab radiators use a stronger alloy for the tanks and components, swept bends instead of cut and welded tubes for better flow, and some slight differences in manufacturing technique.
Simon @ SiFab.co.uk