I just came across these yesterday. I called on3 and they told me they are starting shipments in 2 weeks. They arent very pretty but they are like the Kurgans except the pump brackets can be interchanged for GT pumps or Worlborro's.
On3 96-04 Mustang Cobra 4v 2 or 3 Pump In-Tank Fuel Hat Return or Returnless | eBay
On3 96-04 Mustang Cobra 4v 2 or 3 Pump In-Tank Fuel Hat Return or Returnless | eBay