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Discuss Looking for transformer in the Electrical Forum area at ElectriciansForums.net
This is the closest I can find on the RS website.
VB 1,0/1/9 | 9V ac 1 Output Through Hole PCB Transformer, 1VA | Block - https://za.rs-online.com/web/p/pcb-transformers/7320317/
It's PCB mount so you'd need to solder your own leads on to it
I'm sure Maplins would have had one......shame.