The most recent release can be found here:

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Both WHS v1 and the newer WHS 2011 are out of formal support by Microsoft, 1/8/13 and 4/12/16 respectively.
But (at least with v1) should I do a clean server install, the service packs & the updates will push in. So I'm wondering if there any way to use WSUS to pull these updates?
I do have most of the KB numbers for them and tried to look them up in Microsoft Update Catalog. But some are there, some are not.
Thanks in advance for any help and advice.