Do any of Elder’s bookstores still exist?

No. However, at least two, and probably four buildings that once housed Elder’s stores still exist. Here are the details:

• Mills Building, northeast corner of Bush & Montgomery, San Francisco. Elder’s shop was a room on the mezzanine. The building was burned out in the 1906 earthquake and fire, but the shell was saved and the interior rebuilt. The Mills Building still stands today.
• 238 Post, San Francisco. Destroyed in the 1906 earthquake and fire. The old Gump’s store now occupies this location.
• 22 Chapala, Santa Barbara. Demolished.
• 1203 State at Anapamu, Santa Barbara. Uncertain, but probably not any of the existing buildings at this location.
• Bush & Van Ness, San Francisco. Demolished. Now the site of a five-story hotel called the Sonoma Inn.
• 43-45 East 19th St, 4th floor, New York City. The building at this location looks old and is still numbered 43-45, so it is probably the building where Elder had his shop.
• 239 Grant, San Francisco. Built in 1909 as the “Paul Elder Building”, it still stands at the corner of Grant and Campton Place, now numbered 233 Grant.
• Booth at the Panama-Pacific International Exposition. Taken down at the end of the fair in November 1915.
• 239 Post, San Francisco. This is probably the building now numbered 251 Post.
• Sutter & Stockon, San Francisco. Demolished. Now the site of the Grand Hyatt Hotel.
• Mills Building. Paul Jr opened a small satellite shop, somewhere along the Montgomery Street sidewalk, in order to serve the downtown business community. This space would still exist today, though much remodeled.