FeedBackBuster for guitars with "F" holes

[big monkey]

I was at Jun Castro's the other day to have my Epi Archtop set up. He mentioned he has seen a "feedback buster" type insert for guitars with "F" holes. Normally they are round for flat tops.
Anybody know where to find?

Salamat!

[katzenjammer]

a good alternative for that is to put a scotch tape on the hole or put a foam inside the f hole.. 

[gisan925]

George Benson uses Scotch brand magic tape on the f-holes of his guitar for live performances!

[kawayan_strat]

a good alternative for that is to put a scotch tape on the hole or put a foam inside the f hole.. 

George Benson uses Scotch brand magic tape on the f-holes of his guitar for live performances!

+1000 on the clear scotch tape!

[CARABAO]

meron akong nakita before eh.. hmm.. parang material ng tsinelas.. bale rubber siya na custom made para sa f-holes ng gitara mo. air tight pa. pwede siguro i-DIY

[Phil]

http://www.dougsplugs.com/

[CARABAO]

http://www.dougsplugs.com/

SAKTO!

[blue buddha]

We used to stuff a pair or two of old black socks into the f-hole. Works perfectly, and you still see the edge outline of the f-hole if your guitar has ivoroid or plastic binding. Cheap, effective and "recyclably/environmentally friendly". 

[big monkey]

Thanks for the replies! The dougsplug looks great, salamat Phil 
For now I will try clear tape or blue buddha's Med-jazz