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LT3748 Replacement?

Hi everyone,

The IC shortage seems to be getting to my design again.

I need a replacement for the LT3748. I used two of these devices to generate isolated rails.

My input supply was 12V.

The output of converter 1 was 12V, 1A

The output of converter 2 was -12V, 1A

Is there any recommended alternative as I cant find anything :(. Thanks!