i picked mine up at the Pick N Pull. wanna say i paid about 30 bucks for both. Never really Looked online tho...
don't really know about sending unit issues as mine is still the same ol junk yard one, I have heard of people having ground issues on the sr5 clusters however. And as a matter of fact one that note I own 3 sr5 clusters as the first 2 had some Jankie s*** wrong with them.... To this day my water temp guage some times acts silly.....