I have a competitor I never use and deeply want a spade shaped monofin. Is there a way to cut/shape the competitor to that shape?

If not, any idea the best way to make one for use with fabric tails?

My ideal shape Fluke for the Competitor is number 8 from the choices in the picture below. If that's not possible number 5 is my second choice and looks easier as it's closer to the competitor shape. In both cases I want a single solid fluke, no split so ignore the lines that look like a split. As for needed advice, I'm incredibly handy, a costumer with alot of tools on hand and live for DIY, so if anyone could explain the process clearly for either cutting the competitor or making my own it would be deeply appreciated!

Should this be impossible either way, if anyone knows someone who makes custom shaped monofins, please send their info my way!

Thank you all for any help, this is my first post (longtime and fervent reader though &#128522.