I think the 6th Court of Appeals still has both WL and Lexis.
In my experience, the justices and the staff attorneys at the Texarkana CoA also appreciate parallel citation to the page number(s) of the slip opinions. (I use the corresponding page numbers from the .pdf version of the Spence opinion available on the CCA's website.)
I.E.: Spence v. State, No. PD-1458-09, slip op. at 2, 2010 WL 3564801, at *1 (Tex. Crim. App. Sept. 15, 2010) ("We conclude that the plain language of Texas Transportation Code 502.404(a) requires that a license plate be displayed at the foremost part or front of a vehicle, most commonly the front bumper.").