As already mentioned get two small diaphragm condenser mics. IMO the Oktavas are excellent mics.
Here are some inexpensive but high quality mics that consistently receive high praise from the folks over at the Gearslutz forum:
3U Audio: CM1 and Warbler 127
Line Audio: CM1 and CM3
ISK: Little Gem and Pearl
Here's two interesting and informative threads:
https://www.gearslutz.com/board/low-...cings-178.html
https://www.gearslutz.com/board/low-...nd-heaven.html