A bunch of new vintage microphone impulse response files have been uploaded to the MicIRP blog.
These include an RCA KU3a, Gaumont-Kalee 1492 and a bunch of other ribbons, plus some trashy dynamics for fun.
Thes files are for use with convolution reverb plug-ins such as those found in Logic and Pro-tools. I have been using AudioThing’s Fog convolver, which works well.