Are there coordinates for where orbiters deorbited? Options

[Antdoghalo]

Are their sources providing tentative coordinates for where orbiters like Venera, Pioneer Venus, Venus Express, or Magellan may have entered the atmosphere much like those for the Pioneer Venus Multiprobe bus at 37.9°S 290.9°E? (Magellan maybe impossible due to it being a farside deorbit)

[Gerald]

You'll find a detailed discussion in "An Analysis of the Corridor and Guidance Requirements for Supercircular Entry into Planetary Atmospheres" by Chapman, Dean R, NASA Technical Report R-55, file name 20040030504.pdf.
The document applies to planets with an atmosphere, including Venus.
Note especially "Figure 13-Overshoot boundaries for single pass entries.", which also includes multi-pass atmosphere braking.

Overshoots can occur for all kinds of orbits that are supercircular, especially elliptical, parablic and hyperbolic ones, provided the entry angle is sufficiently shallow.

Actual numerical simulations for a given probe are beyond my ressources. I wouldn't expect any result other than rlorenz already stated, execept maybe for some probabilistic distribution of entry points on the basis of a large number of Monte-Carlo runs.