I've been happy with several "Sumnacon" silicone leads from Amazon. Here's a set of alligator clip leads and a set of mini hook leads for $9:
- https://www.amazon.com/Sumnacon-Multimeter-Test-Lead-Set/dp/B07F8R3VG9
However I personally prefer this style of alligator clip:
- https://www.amazon.com/Sumnacon-Multimeter-Crocodile-Alligator-Stackable/dp/B073ZVJDCF
But then you're pushing the cost into the double digits
Seems they have a foreplay related application as well. Read the second paragraph in the prescription OUCH!
They are available separately on Amazon.co.uk but so far, I've only found them bundled with other stuff on Amazon.com...