I found these, may be of use to someone and they look very well made:
Linky Mc Plinky.
Linky Mc Plinky MKII
Linky Mc Plinky.
Linky Mc Plinky MKII
13.66ï¿¡ 20% OFF|Paul THUMBIES Bicycle Dial Converter 22.2MM For Brompton| | - AliExpress
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