Origionally I saw them listed on eBay from FiveO for about $480. This was a little steep for my truck budget so found a company called Motor Man Fuel Injection on a search of Google. www.injectors4u.com
The injectors were cross matched and have the same specs as the origional equipment. Got 10 injectors for $382 incl shipping. These injectors have the Gen lll 4 hole design which should enhance atomization. Installation requires removal of the intake plenum which is not too bad once all the air intake and throttle body are removed.