u can get them on ebay prtty cheap, look on ebay shramm usually has some for sale on there. also try hi-wayautoparts.com. u can get a 5.3 a lot cheaper, but the 6.0 is what i optioned for. i picked mine up for $1,700(30,000 miles), but initially the guy wanted around $2,300. good luck finding a 6.0HO but if ur wanting to add boost later, id recommend sticking with the lower compression 6.0(LQ4). Good luck! Let us know what u find!