There is a guy on ebay UK selling NOS Delco distributors for about 57 BP complete with amplifier that has Lucas label but has Delco insides. It's exact replacement for my 80 Spider but I don't need amplifier as the amp is integral in the square coil. For $188 delivered including taxes, shipping, duty it seemed like a good deal. UK folks apparently can put in their mechanical advance weights and springs to get their performance.
PS: I got it as a spare should my distributor go TU.
TR7 Spider - 1978 Spifire - 1976 Spitfire - 1988 Tercel 4X4 - Kali on Integra - 1991 Integra