It's definitely a Samtec part (has the "S" logo), and could be TFML-145-01-L-D:
https://www.samtec.com/products/tfml-145-01-l-dA brief search on Octopart doesn't show availability anywhere, but it looks like Mouser and others can backorder it for you, or you could possibly order directly from Samtec.
Alternatively, you could start with any of the 90-pin probe adapters and use it for parts. Right now there are a bunch of E5380B probe sets (90-pin to Mictor) on everyone's favorite auction site for non-insane prices ($15 ea.). If your signals are slow enough, you could create a Mictor to flying lead adapter.
Edit/correction: The listing is actually for the "E5380A" if you go looking for it. Same functionality as the "B" version, just a later rev.