Personally using a PX1 without issue, but you'll have trouble finding them (discontinued).
The Angelbird PX1 is no longer available. There is a substitute made by the same folks, but UK only AFAIK:
https://www.megamac.com/products/wolftech-pulsecard
https://www.amazon.co.uk/Wolftech-pulsecard-Length-Profile-Adapter/dp/B019CIYTD4
Lou
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