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There are many options for this system on Amazon. Here are a couple links to get you started if you're interested in some version of this system. The exact option that I got was a good deal that was promoted over the holidays.

one thing I forgot to mention is that this could be used as a straight edge also without the guide. it works in a similar way but wouldn't have the saw locked in as well.

Full straight edge with saw plate
https://amzn.to/45vcs03

Just the straight edge
https://amzn.to/3kZ7p5R