Back in Spring Training 2021, Kris Bryant was wanting a more balanced bat based off the B445, a bat that he’d used in past seasons. The B445 is basically an S318 with a different knob. After another slight adjustment to the knob to create more balance, Bryant liked it, and that bat became the B445L model. Kris Bryant has been ordering that bat ever since. (Thanks @sluggernation for the info.)
The closest thing to the B445L is the S318 or the C243M, but the taper from the handle to knob will be a little different. Get the S318 at Slugger.com for $150 or the Cody Bellinger model CB35 (which is the same as the C243M) for $160.