Offline Device to backup MFA seeds

Hi all !!!

Lately I have been thinking how fucked up I would be if I lost my phone, where it contains all the MFA codes for Crypto exchanges, banking accounts, etc.

My though was to buy a cheap phone just to have it as a backup, as a safety measure and never take it out of my home. Is there any other device, even a DIY that could be used instead of a phone?

I m listening what have you guys done regarding this issue!!