Well, considering this is a hypothetical that is pretty unlikely to happen, the top 10 on Ford's big board right now are:
1. Anthony Davis
2. Perry Jones
3. Harrison Barnes
4. Andre Drummond
5. Jared Sullinger
6. Thomas Robinson
7. Michael Kidd-Gilchrist
8. Bradley Beal
9. Jeremy Lamb
10. John Henson
Even assuming Jones slides to 5 behind Barnes, Drummond, and Kidd-Gilchrist (who people seem to be getting pretty high on), I don't see the Spurs having nearly enough to pull a pick that high. Now, somebody like Henson at 10, I'd be very OK with that pick, but again don't know what they can trade to move up that high.
Once you get around the 20s, there are some serviceable looking big men. I guess it all depends on what the Spurs could scrape together (if anything) for a high pick.