Dead Pedal for LHD MGB?

[Matt Trebelhorn <matt.lists@trebelhorn.com>]

Drivers of RHD cars can use the starter cover as a dead pedal; LHD cars 
don't have a practical place to rest/brace the left foot.

If you have made up a dead pedal for a LHD car, what did you use?  How 
big is it?  How is it secured?  Got a picture?

Just asking.  Occasional autocrosses, and an even more occasional track 
day, make me curious.  And driving borrowed cars recently has made me 
jealous of those who have a good place to put the left foot when it's 
not at work...

Thanks,
Matt