I got her brand new from D-Storic during their Goodbye Bimong sale. Ordered on November 11th, received on February 14th. Which issues with production do you mean?
I'm still following the D-Storic waiting room and yes, waiting times are 3+ months right now, but that's because of the goodbye sale in November-December (Naraes could only be pre-ordered from them until December 31st), they got a ginormous amount of orders all at once because (1) of the low prices and (2) it's uncertain Naraes will ever be available again. Other than that, my doll took a bit longer because I chose Korean Real resin and they were having some casting problems with that skintone because of the weather.
Other than that there are no production issues that I know of. If they were still selling Narae, I'd heartily recommend D-Storic

As yet, it's unknown what Bimong will do to get his dolls produced and sold now. Right now, Naraes can't be pre-ordered. They can only be bought second hand. That explains why your friend's doll was sold so quickly.