Lexicon Mc-8 calibration - no original microphone

Hi guys,
I have a Lex MC-8 pre\pro.
I want to use the mic based calibration option, but don't have the original mic set (comes with up to 4 separate mics).
Would it be ok to use a mic that comes with a modern Denon receiver I can borrow from a friend?
Lexicon MC8 units did not come with microphones, I do not think any old mic will work. I had a MC8 for over 10yrs