Bip39 online generator https://www.anobii.com/en/01000289012ff9b293/profile/activity Though it takes advantage of BIP32 technique it is possible to still import BIP39 seeds into Electrum wallet. Also aside from BIp32 There's BIP44 version which some wallet use with the generation of seeds. BitBox02 - A successor to your BitBox collection, this components wallet supports https://getsocialsource.com/story5577052/bip39-recovery-seeds-a-secret-weapon-for-bip39-mnemonic-code-converter-tool-https-cutt-ly-uryc5rw7