We can buy a linear power supply for the Director for a couple of hundred quid or less, probably better off buying one of these for an unmodified director and waiting for a bargain on ebay.
I have 2 Directors, one cost just £120, the seller even included some free sweets

Have tested one back to back with a 861 v4 and found the director ok, but lacking vs the 861 and quite bright, it needs flatter sounding RCA cables to tame the treble somewhat, but still wouldn't sell them, for the money it's a good dac, ok for music but sound really nice for movies, very similar to the 861.
Ideal for a 2nd or 3rd system.
Obviously they are 24bit / 192k unlike many Meridian products, making them slightly smoother to listen to.
Was going to use one in the car via a tablet, but never got around to it, maybe one day.
Not sure i'd buy this one on ebay.