Hi WWT,
May I suggest simply turning on the solid state relay (SSR) at zero volts. You can use a standard chip to do this or do it yourself.
The SSR, if it is an AC type, can only turn off at zero volts, so you will not get a voltage spike at turn off.
By the way the voltage generated by an inductor is, -L * dI/dT, where, L is the inductance of the inductor in Henries, dI is the change of current in Amps, and dT is the time in seconds. It, thus follows that, if you disconnect an inductor from its current source instantly the voltage generated by the inductor will be infinite, in theory that is. Because the inductor is not perfect, and because of parasitic capacitances and resistances, the voltage will not be infinite, but it could be 2 to 5 times, typically for a relay, of the input voltage (that is causing the current flow).
spec