Dual Master Cyilinder

[William Huff <whuff@xxxx>]

Hello Group,
This may have been covered before, but I can't find it. Does anyone have 
any info on availability of parts and methodology to convert the old single 
master cylinder to a dual system? I want to do this to my '58 300D since 
the existing master cylinder is beginning to leak and anyway I feel much 
more secure on the road with a dual system.

Thanks,

Bill Huff