Allon Whites have a trim shop and do bespoke tonneaux, rather than off-the-peg, they made a half tonneau for my 4/4 Sport in black Everflex for a very reasonable £150, complete with cut-outs so the seat belts don't tangle. The fit is spot on, if you look carefully you can see the remains of White Square tailors chalk where the press studs and turn button holes were carefully marked after first try-on.

Frank - I think MMC have used the regular block for your tonneau when they should have used the 'portly' eat