Unfortunately I do not know where you can find your beloved mascara, but some of the ways that you can track the item down is by checking the Lancome website if the product has been discontinued for starters or you can go into a speciality cosmetics department store like the Red Square stores and have them look the product up on their system. If it is available they will be able to order it for you as well as have it sent to the closest store to you.
Other alternatives are the Rimmel mascaras which I’ve personally used for years now and can honestly say works like a charm. From lash extending to thickening, they offer a wide variety of mascars that you can choose from and they are available in both black and brown. I hope you find the product else I’ll be happy to help you research some other ranges which may suit you better. Good luck!