Flexplate is not fits the torque converter

The 10242 is not available currently. None of the B&M flex plates you have are correct.
You can make the correct flex plate using a template to copy the cutout in the 10242. Hughesengines.com is selling one like this but it’s expensive.
B&M Flexplates 10242 - on the picture it's looks like B&M 10237.