Welcome to Vodafone Community
I cannot see anything on the Vodafone Online shop so they may not yet be available.
If you cannot find any 3rd party options on Amazon or Ebay then perhaps give Vodafone a call to ask.
Current Phone > Samsung Note 10+ 5G _256Gb > Model: SM-N976B.
Samsung One Ui / Pie.
Samsung Gear s3 Frontier Watch.
The V watch is in partnership with TCL Move. There is a support link for the company with a phone hotline on the link below.
Also take a look at the Alcatel website here: https://eu.alcatelmobile.com/en/mobile/wearables/move-time/