There is no dispute about quasar redshifts, and the Wolf effect has not been used to suggest that "quasars might not be at cosmological distances" (unless ScienceApologist has a source verifying his statement). What some researchers of the Wolf effect have said is in the last quote of the article:

"we note the possibility that correlation-induced spectral shifts may contribute to the shifts observed in the spectra of some astronomical objects such as quasars"

James also writes:
".. our results do demonstrate the plausibility of the existence of extra-galactic objects with discordant redshifts due to well established physical phenomena.

"It should be emphasized that our theory is based entirely on established principles of optics: no hypothetical new physics was introduced. Furthermore, certain aspects of the underlying phenomenon, the Wolf effect, have been tested extensively in the laboratory."