RF filter question.

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Original poster: "Vince D'Amore by way of Terry Fritz <twftesla-at-qwest-dot-net>" <vincedamore-at-earthlink-dot-net>

Hello People
 
Being that I am gather the supplies still for my coil to get under way.
I now have several of the supplies to make the components. 
I am curious about RF filtering for my NST's 
 
Should I make an RF filter or purchase one? 
If I purchase one what should I buy?
If I make one, does anyone have a schematic I can follow for this?
 
 
Thanks 
 
Vince