R help - Sep 2010 - stratified Wilcoxon's rank sum test with the locally best weights

Hello,

I have been informed that there is no R package for the stratified
Wilcoxon's rank sum test (Van Elteren's test) with the locally best
weights.

I need to use the alternative test to a clinical endpoint where the
distribution approximate normal distribution, and compare to the regular
ANOVA.
 
I have been directed to use SAS with PROC FREQ with the SCORES=modridit
option and CMH2 (SAS only has the locally best weight option??)

I will never go back to SAS, and believe a code for the above test
already exists??

Thanks in advance
Ahmed