Didn’t reply yesterday because we were on our way out to celebrate our 45th wedding anniversary at a local restaurant. How did time fly like that? One day I was a wet behind the ears 21 year old groom and now I am a 66 year old juvenile delinquent!.
I’m sorry but can’t help with your dilemma. When you listed the part number of the ferrites you used for your DIY copy I looked them up in my records and saw that I had rejected them in favour of different ones. It must just be the current vagaries of the component supply chain causing the supply issue.

Have you bought a second Mscaler to need two sets of cables? Good luck with the search.