Dell XPS 8700 i7-4790 OEM Heat Sink

Hello

I currently have a 2013/2014 build Dell XPS 8700 with an i5-4440. I know these i7s came with the i7-4790s.

I am looking to upgrade to the i7-4790. I know the motherboard/bios support it, but I know the motherboard does not support stock Intel heatsinks, or aftermarket ones. What is the OEM Dell heatsink/fan that came on the i7-4790s part number, so I can purchase that? Are there new after market coolers that work on the Dell motherboard without having to change out the bracket.

Can Dell moderator help by providing me the OEM part of the i7-4790 heatsinks that came on these XPS 8700s?