There's also
this superturbo Volvo inline 5 powered Opel Manta. Nissan made a superturbo March for some unspecified period of time (I only know about it 'cause it was in Gran Turismo 2), and the group B Lancia Delta Intergrale was twincharged as well.
I may have heard somewhere that HKS made a turbo kit for MkI supercharged MR-2s, but they may have meant the turbo was a replacement, not an addition.
And then there's this thing:
It's supposed to be a Holden, but I don't know what model or where I got the pictures from. Anybody else know?