Not really, the most common mention is that of the Helmand (Haraxvati) but in many places of the Rg veda, the rivers are mentioned in order which simply makes it difficult to sell that proposition. It is equally likely that Iranian speakers did call the Helmand, Haraxvati because of the Sarasvati (no evidence either way except that in linguistic change accepted, S turns to H, not the other way around). The Rg veda is diificult to place anywhere else, something that has grudgingly been accepted even by most AIT scholars. The monsoon lands, the flora & fauna mentioned make it almost impossible to situate it out of India.
Soma is interesting because its origin is largely unknown to the early people of the Rg veda (brought from far, from the Heavens, by an eagle etc). Only later mandalas have some knowledge of its origin. Even the two priestly tribes most closely associated with the Soma, the Kasyapas & the Bhrgus are later entrants into the Rg veda. The Kasyapas,according to tradition, associated with Kashmir and the Bhrgus(save Jamadagni and descendants) with the enemies of the vedic Aryans. The Rg veda credits the Bhrgus with introducing Soma to the vedic aryans.