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I'm potentially changing headset type on my Pipedream frame (44mm headtube) to take a straight steerer fork, but I didn't do a fabulous job of inserting the original headset (or my cheapy headset press didn't) so I'm looking for something with a deep lower cup to make sure I don't get any ovalizing issues
The Nukeproof B-type in the image below would be perfect, but they no longer seem to exist. Any other options?
(Otherwise I do have a B4 from the below, but the extra height isn't ideal)

I think this is what you need.
https://www.chainreactioncycles.com/nukeproof-neutron-bottom-headset-cup/rp-prod124574
Yep, that'd be spot on but the B2 is no longer listed unfortunately
I have an unused one in gold, brave machine I think, it has deep cups 44mm zero stack for straight steerer, I bought it for a friend's Trek years ago but his headtube had an internal step so the cups were too deep, I'll find it tomorrow and measure how deep.