Unfortunately doing so would be extremely difficult. Good quality Linear MOSFETS are decreasing in availability as everyone (including the analogue guys) switc

Unfortunately doing so would be extremely difficult. Good quality Linear MOSFETS are decreasing in availability as everyone (including the analogue guys) switch to using them in saturation mode. There are exceptions but by virtue of being the exception they are expensive. A lot of MOSFETs don't even spec their linear regions anymore. The trend is away from linear.