Toshiba 43L621U no picture, probably backlight LEDs, can't get part

Thanks to someone asking my question a few years ago, I’m pretty sure my solution is here 43L621U LCD no picture after turning on

However, the backlights I need (4708-K43WDR-A1213K11) are out of stock everywhere I see. Is anyone aware of any other LED strips compatible with this, or an alternative solution? Thanks a lot.