Hi,
They were just salvaged used heatsinks, not new retail ones. So no link, sorry. The one advatage is that they already have a whole bunch of mounting holes drilled and tapped in them so that makes it easier for me to mount them and possibly mount fans right on the heatsinks. There are lots of used heatsinks in different sizes available on eBay if you search. The only catch might be shipping to Canada. I have a mailbox just across the border in WA state that they were shipped to. Saved me something like $25 in shipping costs as they were heavy and no taxes or duties. Just a confused look from the border gaurd as I tried to explain what a heatsink was and what I was going to do with them
I haven't figured out eaxctly how I am going to wire them yet but they will be on 8 separate drivers (4 for whites and 4 for blues) so some will likely span heatsinks. I could probably put a connector in to go across heatsinks but they will all be mounted flush against each other in the housing. They are 15" long for a total of 45" in a 48" housing so I will just leave 1.5 inches on each end open. Right now I am trying to figure out how I am going to mount them in the housing. I'm a biologist, not an engineer
Once I figure that out the wiring is the easy part.