I don't know how the CCIR quasi peak is done exactly but you will find it anywhere. For all the other you need the noise, with proper timing, maybe 2s RMS, on each band, to do spectral and unweighted that will do the job, for EIN dBA you need the value per band, apply the A curve and apply the sensitivity probably at 1Pa to the reference value, which is 2*10^-5 Pa. So, you have XdBu @ 1Pa,1kHz (94dB SPL=94dB A), Then, for your noise which will be YdBu you can know the pressure. Let's say you have -30dBu sensitivity (I don't know if I'm even close to your value) and -100dBu noise.
-30dBu----->94dBA
-100dBu---->EIN[dBA]=24dBA (my example is crap!)
For the unweighted you still need a filter, it doesn't make any sense to have a value affected for the 1MHz noise you may have in your mic, since it will die soon, at most I would take a 100KHz bandwidth, and maybe filtering some of the low side, at a couple of Hz maybe, both of which will be probably done by your preamp anyway.
I would stick with the replacement of the capsule for production test, I don't know the final EIN of your mic, for acoustical measurements usually you want to keep your measurements over 10dB of the noise floor, an "enough" silent room to measure 7dBA EIN is -3dBA (NUTS!) which is typical figure for low noise condenser microphones, for ribbon probably you will have more, some Royer are around 18dBA EIN I guess, not well specified.
JS