I don't think you will have any problem here.
Resistors. 1% metal film will put you in good company. I'm not going to get into a Carbon verses Metal film argument. Al I'm saying is, if you use 1% metal film the circuit will work as expacted and the noise due to the resistors will be low.
The 6.8k phantom resistors must be as close as posible to the same as each other. 6.7 or 6.9 is not the point but they BOTH have to be the same.
Capacitors. The modern RB style used in this project are all good. If you chose a low-leakage 105 degrees modern cap you will be fine.
The ferrites are just little cylinders that I put a resistor leg 'off-cut' through the middle of.
Power Supply. I have a power supply in the works that should be fine for this project. See Group DIY. In the mean time volt batteries can be used as a clean and stable power supply for both the main power and the phantom.
my site for details or I can explain later.
good luck. This is a good beginner project.