Comp cam XE 274 help

Hi folks I'm new to this site from B.C. Canada but have read many threads on engine builds in the past. Trying to find a new Comp Cam kit # K20-224-4 XE 274 h , cam ,lifters, timing chain , springs and such. I've searched many stores through Canada and the States without luck for a 318 LA build . Can anyone point me in the right direction please.