A tiny 1.3 GHz FET Probe.
You can find measurements here. Additional details on the design of this probe can be found on Hackaday.
Any standard 1.6 mm thickness stackup should do the job. 1.6 mm is relevant here because it has an influence on the input capacitance.
You can find production files under the "Summary" -> "Artifacts" section of the "Actions" tab, or in the releases section.
Manufacturing files are automatically generated for JLCPCB and included in manufacturing.zip. Additional documents can be found in assembly and debugging.zip.