Indeed a lot of help and enthusiasm! Thanks friends!
Ok, so... PhilA had also recommended those teflon furniture sliders that in1unison recommends. Those may (I must emphasize 'may' as I haven't found them yet) be available locally. One quick question regarding those: will they make the speakers 'dance' on top of the table being prone to falling?
Have you ever been to a party where enthusiastic young boys put speakers on high tables to get more sound only to have the speaker fall to the ground after beeing vibrating for a few hours? LOL! I am not going to be playing that loud, but we have a young kid in the house who often comes jumping into the room. Will these feet make the speakers 'float' on top of the table and be prone to easily moving like those Curling Pucks trying to reach their mark?

I'm searching locally, very little luck. I can't even find the local name for rubber isolators, the closest thing is acoustic foam for wall sound conditioning.
Thanks again,
Rafa.