Door Bell wired added wireless transmitter

[dugit]

Because my hearing is getting worse and I miss the door bell I have been looking for a means of extending my present wired doorbell to have a wireless extender to be wired into my system.
I have seen advertised an rc3200 in the United States : ! The Plug-In Extend-A-Chime expands an existing wired doorbell to be heard in any part of the home. The transmitter connects onto the low-voltage screws in the existing doorbell.
But I cannot find it or an equivalent sold here in the UK?

[ericmark]

They are sold Friedland did them when I last looked but the price was silly. So I got two sets of wireless door bells from Lidi when they were on offer and have them all set to the same door push. First I used the plug in type from Aldi but these failed and also keep getting unplugged so went for simple battery type. With three going off together it's an unholy row no way can I miss it going off. Batteries last around the year so seems best option.