Still there's no proper replacement for that spot yet! But I'm confident that Dravid's & Laxman's positions can be taken up because there are many good young batsmen in the domestic circuit who bat well in those positions like Pujara, Rohit etc. Rohit has a phenomenal FC batting average and can play gems so hoping that he gets back to form soon and clears his lazy mindset.
Apart from Yuvraj there are some other contenders for no.6 like Saurabh Tiwary who's done well there in domestic cricket.
I really don't think you need a specialist #6 to bat in that spot, any opener would do tbh, they're usually the ones gearing up to take on the 2nd new ball.