Need help mounting stock LS1 fuel pump in my tank

[trkfrk]

Hey guys, I have been looking for awhile now and I am not able to find a way to install the factory GM fuel pump into my tank. I am trying to avoid buying a new tank and really want to stay with the GM fuel pump. With so many of us doing the conversions you would think there would be an aftermarket mounting kit you could bolt in or weld. I have already modified the tank by welding in the filler neck and installing a baffle inside. Any help would be appreciated. Here's a picture to help clarify.