Nope there are no 50 MHz PLCC FPUs, as the generated heat of the core would melt through the plastic caseing.
I also heard that the FPU has an impact on stability on A600 turbos, as the required signals that are taken from then 68000 are week to begin with and are even more stretched at higher clockspeed.
And really what software does require / benefit from an FPU that runs satisfactory speed on a humble 68030. You really don't want to do raytraceing on it do you ?
