The ZB17x eccentricity solutions span the past 100 Myr.
Available solutions include "ZB17a", "ZB17b", "ZB17c", "ZB17d",
"ZB17e", "ZB17f", "ZB17h", "ZB17i", "ZB17j", "ZB17k", and
"ZB17p".
Source
All astronomical solutions by Zeebe can be found on http://www.soest.hawaii.edu/oceanography/faculty/zeebe_files/Astro.html.
They can be loaded into R quickly, using get_solution().
References
Zeebe, R. E. (2017). Numerical Solutions for the orbital motion of the Solar System over the Past 100 Myr: Limits and new results. The Astronomical Journal. doi:10.3847/1538-3881/aa8cce