I dont think you can replace just the bushings on the upper control arms, and the end links im not sure either, why not replace the entire unit for a new one? Theyre not that expensive
EDIT:
Doorman upper control arms are $43 on rockauto, or $61 for moog:
http://www.rockauto.com/en/catalog/nissan,2005,titan,5.6l+v8,1431297,suspension,control+arm,10401
Moog end links are $16.
http://www.rockauto.com/en/catalog/...8,1431297,suspension,stabilizer+bar+link,7580
EDIT:
Doorman upper control arms are $43 on rockauto, or $61 for moog:
http://www.rockauto.com/en/catalog/nissan,2005,titan,5.6l+v8,1431297,suspension,control+arm,10401
Moog end links are $16.
http://www.rockauto.com/en/catalog/...8,1431297,suspension,stabilizer+bar+link,7580