Floor Protection Discs


Good Morning Audiogon'ers!

Seeing if you could help me. I will be purchasing a pair of Target Audio HR70 monitor stands. Since they'll be going on a hardwood floor, I was also going to purchase Target Audio's 'Floor Protection Discs' to protect the floor. Is there a cheaper alternative -

https://www.dedicatedaudio.com/products/target-audio-spike-footers-floor-protection-discs-set-of-4


fuzzfriendly
I would buy the Herbies gliders so you can easily reposition the speaker until you get it dialed in.  Not cheap, but very good. In fact, Jim Smith recommends them for sonic reasons in Get Better Sound.  
Thanks everyone your replies. It's tax return season, so I decided to bite bullet and purchase the Target Audio discs.
Just put a penny under each spike. You probably won't be able to hear a difference between that, and a more expensive option.
I've used the penny method, but they left an imprint on my wood floors. I then used a layer of cork under the penny, and the speakers sounded even better.