This *rather simple Gargoyle search
<https://www.google.co.nz/search?num=3D20&site=3D&source=3Dhp&q=3Dultra+low=
+noise+bipolar+transistor&oq=3Dultra+low+noise+bipolar+transistor&gs_l=3Dhp=
..3..0.2765.12330.0.13523.35.23.0.12.12.0.278.4638.2-20.20.0....0...1c.1.64.=
hp..3.31.4391.0..35i39k1j0i131k1j0i67k1j0i10k1j0i22i30k1.YEtNNOH-uCo>
*
seems to have some potentially good leads.
You've probably been through all these by now, but just in case.



PeripheraL

MAY be useful   http://www.ti.com/lit/an/snoa626b/snoa626b.pdf


http://www.janascard.cz/PDF/Design%20of%20ultra%20low%20noise%20amplifiers.=
pdf

                       http://www.beis.de/Elektronik/LNPreAmp/LNPreAmp.html

                       http://www.garrettaudio.com/DATA/2SV888_DATASHEET.pd=
f


http://www.diyaudio.com/forums/solid-state/17285-ultra-low-noise-transistor=
s.html



http://electronics.stackexchange.com/questions/10406/low-noise-audio-freque=
ncy-bjt

or not



SiGe cryo :-)
http://aip.scitation.org/doi/abs/10.1063/1.3655448?journalCode=3Drsi



          R
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