I know this isn't answering your question but just throwing it out there, I purchased a throw rug and cut it to shape. I used my snap kit to install snaps in the carpet and purchased binding from Amazon that attaches to the carpet with tape and a hot glue gun. All said I did the helm for around $300. Just another option.
The pic shows the rug my wife chose. I didn't put the binding around the table cutout yet in the pic.
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