You bought 50A CTs, and those are the smallest available from the store. There are smaller solid core on the market but you would need to add a longer cord, 3.5mm jack and optionally a TVS diode. Search this forum and you will see some discussions about various models.
I have many of them (that I bought with the ECM-1240 I bought over a decade ago). I have been meaning to send a couple to Bob to get numbers for them. I use the following numbers with them:
Turns: 1525 (sometimes 1528)
Phase lead: 1.2 to 3
Clearly, I need to get the samples to Bob, since my numbers are all over the place