There are inexpensive 30 day Pay As You Go plans from carriers in Europe like Three and Vodaphone that might suit your needs. Three has plans that give 3,000 voice minutes, 3,000 texts, and 1-4 Gb of data for $13-$14.

What phone do you use, and what does your current carrier charge for Euro roaming? Sometimes it's worth the extra fee to deal with them and keep your phone number active. There are also esim services that you can possibly add to your device for a dual sim function. I wouldn't focus on what you might leave on the table if you pay less in the long run.