[Fot] Higher performance from rear drum brakes?

[Scott Janzen]

I'm hoping to get better stopping out of my GT6 braking system - it  
runs stock calipers up front with Hawk Blue pads, which I am satisfied  
with,  Dual masters with balancing bar, everything in the system in  
excellent condition.  Having read Kas' recommendations on tuning up  
the braking system, I realized my rear drums have been turned so many  
times that the stock shoes probably have about one point of contact!   
I plan to get "new" drums to get the diameter down to spec, and am  
wondering if there is a supplier for rear shoes with a better friction  
material than stock.

Any suggestions or lessons learned on the other TR models?  I run  
vintage and need/want to stay with stock calipers, disc/drum set-up,  
etc.