Any reputable book-store, even if they don't have the titles "in store", should be able to order books for you from any llist you supply.
A good compromise might be to LOOK UP the books you are interested in using the power of search-engines online, both generally and at some of the bigger online bookstores, and then go to buy at any physical bookstore.
Certainly here in the UK they have all, from the smallest single-man shop to members of the largest UK chains, been eager to take business, even if it meant them finding and ordering books from publishers.