Protect cork floors from speaker stand spikes

What should I use to protect my cork floors when using speaker stand spikes?
Sorry, I should have searched the forum first. A lot of information. This thread can be deleted.
There are any number of "cone coaster" type protectors, but I would recommend trying Herbies big fat dots - either directly under the stands without the spikes (for very little risk to the floor if the stands are bumped), or under the cone coasters below the spikes (which may be a bit harder to set up).
I use sound anchor coasters. link to a pic of my system, see bottom of speaker stands:
They are not cheap, when I bought them around four years ago, they were around $16 EACH. Here is a link to sound anchor. I see that the price has stayed the same. (The design seems to have changed slightly.)