When I first read thisI wasn't surprised that Alison Jackson was having trouble finding look-a-likes for Mandelson, Darling and Brown. Let's face it if I looked like any of them I'd get plastic surgery, hide in a very dark place or convert to islam and take up the veil. Anyway using the wonder that is the internets (thanks be to Al) it only took me a couple of minutes to find the looky-likies below.
Lady Fondlebum of Boys & the Great Reinaldo
Plastic Fantastic Darling
They all look like dead ringers to me and the looky-likies would probably do a better job than the originals.