Here is Setterfield 1987, first peer-reviewed publication of the hypothesis.
Here is Montgomery-Dolphin 1993, improved data-point set and statistical analysis.
Here is Montgomery 1994, similar to previous but with rebuttal of other statistical analyses.
Here is Setterfield 2001, containing the strongest statement of the theory; published in 2002 when reworked.
Here is Setterfield's 2001 explanation of observable consequences of VSL.
Here are Setterfield 2002a, 2002b, and 2002c, the published version of Setterfield 2001.
Here is Dolphin's commentary through 2003 as to the observable consequences of VSL.
Here is Setterfield backup material.
Here is the real datapoint chart, which has not been successfully rebutted, from Bowden 1998:
Unfortunately for Setterfield, there is more to it than just what you call "the Doppler hypothesis." There are several independent lines of evidence which all give the same result. The Four Pillars of the Standard Cosmology.
Additionally, there is yet another line of evidence: the Lyman Alpha Forest.
Setterfield needs to undo all of cosmology, and construct something else in its place that is consistent with all the relevant evidence if he wants Genesis to be scientifically accurate. Merely dismissing the Doppler "hypothesis" (it's more than an hypothesis regarding the redshift these days) isn't going to do it for him.