After much searching, I found an overseas source for an S30 leather dash cover made from Italian leather. Finally got it delivered yesterday and will document the installation process here for those interested.
I had previously attempted a dash repair with SEMS bumper repair but found problems with thermal expansion/contraction causing failures at the vinyl joints. The advantage of leather is the material will expand and contract with the material underneath without failing.
Since this vendor is new to me, I won't give the source until I determine the quality of the fit and difficulty in installation. I am also working with them to verify their design.
So far the only discrepancy I've found is in the recesses for the hazard switch and spare recess for fog light switch (as in my series I - believe later years mounted the cigarette lighter there). They only included one funnel shaped recess for the upper recess. This will mean relocating the hazard switch to the upper position for my installation. I am anticipating the manufacturer will be adding the second funnel in future production.
There are also funnel shaped additions to wrap around the recesses for the speedo, tach, and fresh air vents. The shallow recesses for the three gauges are not included and will be molded in during installation.
After a trial fit I've determined I will pull the dash to install. As with any compound curve fitting with leather, there will be shrinking and stretching involved. Unfortunately, most of the stretching will be in the valleys between the gauges and in the recesses.
Here is where I can use some help from our more experienced members. I've custom molded pistol holsters by soaking them before molding and then boning them to shape. Shrinking with a heat gun should be no problem. I am anticipating rough sizing wet, allowing it to dry in place and then a final fit and glue in place. Any suggestions here would be appreciated.
The leather itself measures 1 mm thick, so I am pondering whether adversely affect installation/removal of the speedo and tach.