SI8751 isolated mosfet driver and msofet NVD5C668NL
You would need a charge pump for high side switch. If you need a switch to be fast as well, then you should consider a DC/DC converter. But unfortunately, with DC/DC you will have some loss, since it will always be on waiting for your turn on command.

If you further need an isolation you can put isolated gate driver, but still you will need a kind of isolated power supply.

EDIT:
If you want just a simple SSR, then the speed shouldn't be your priority. In such case the simplest way is to use photovoltaic coupler which will produce enough voltage to turn on the MOSFET, but this is slow. Look for VOM1271, what you get is the galvanic isolation + gate driver in single IC.