Coinbase and POL/MATIC

I have only recently heard about this conversion. I would like to make the switch before I end up losing my MATIC as I hold nearly 10,000 and have almost 20,000 staked, so around 30k altogether.

I noticed that Binance and Kraken offer a manual conversion method via a smart contract. I use Coinbase to trade because Coinbase One is fee-free. At this time it does not seem that Coinbase has a conversion method nor do they support the new token POL.

What can I do to convert my tokens, without making a Kraken or Binance account?