Finding maps of remote and far away places is a challenge at the best of times. In London I would go to Stanfords. In San Fransisco I would go to Rand McNally's. In Leh Ladkah I would go to the local bookshop in the market square. In Kargil it's the stationery shop, and in Srinagar look in the book shops.

Buy the maps when you get there, I would suggest is good advice, if you can. Unless you can get good quality maps beforehand, though usually they are imported and expensive.

Nepal in particular is being mapped in various projects and developmental schemes and with advances in Satellite photography no place on earth is really further than your fingertips.

Indian maps are surveyed, catalogued and continually revised by The Survey of India, whose maps are sometimes the most accurate to be found.

Private publishers cross India have brought out ranges of route planning-cum-tourist maps, particularly for the hilly areas of north India.

The closer you get to border areas the fuzzier they become and on anything resembling an educational map of India, disputed areas are left unchanged as undisputed; Kashmir's borders are marked as they once were.

I've always collected maps old and new some for the pleasure of reading some for travel navigation. In India on the plains and in the south, I find my way simply enough with a map book, possibly buying local maps I find of any interest or detail.