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PMP11612: Transformer sourcing help

Part Number: PMP11612

I would like some help sourcing the transformer for my implementation of PMP11612. The transformer in the BOM(Sumida 10339-T048) has an inductance of 850 uH and the recommended turns ratio(Nps) for 5V design using the UCC287 controller was 12-15. This was the substitute transformer I was using:, but the part is now out of stock and I was only getting a voltage output of 4.7 ~ 4.8, I'm guessing it's because of a lower inductance and turns ratio.

I was looking into this one part as a replacement:, which is closer to the parameters listed in the reference design, but I was unsure about it as it was suggested for 5v, 3A applications. Could you recommend some contacts for magnetics vendors that'd be able to source this transformer. I have had no luck on my side so any help would be appreciated.  

Thank you.