Plug-In Adapter 2nd Gen

Got my Ring doorbell back in summer and had arranged for someone to hard wire it. Due to covid and isolating I have had to keep rearranging a time for the person to come but they are now unable to come out until end of Jan 2022. I am wanting to buy the plug in adapter but I do not want to wait until April for it to come. Is there anywhere in the UK that sell this on its own? I bought a generic one from Amazon but it kept buzzing so would rather use the Ring adapter. Thanks for any advice!