Trying to buy Optimism with M‑PESA – page seems gone

Was looking to grab some OP via M‑PESA on Paybis, but the dedicated page at https://paybis.com/buy-optimism-with-mpesa/ returns a 404 error. Might mean the option is temporarily down or no longer supported. I checked the main Paybis site and M‑PESA is still an available payment method for some coins, but Optimism doesn't seem to be listed directly with it right now. A workaround: buy a stablecoin like USDT or BTC with M‑PESA, then swap for OP on another exchange. If anyone has found a working link or alternative, drop it below.