I bought the linear power supply for the Bushmaster from Mains Cables r Us. Seems crazy to buy a power supply that costs more than the DAC, but it really is like a different DAC now, and SO much better.
I found the same kind of improvement using the rather less costly S-Booster "Best of two worlds solution" linear PSU available from Mark Grant.
Has anyone compared the two PSU upgrades for the Bushmaster DAC?