Where to find custom double wye santee?

Where can I buy a 4" x 4" x 1 1/2" x 1 1/2" double wye sanitation T?

https://www.lowes.com/pd/Charlotte-Pipe-4-in-x-4-in-x-4-in-x-4-in-dia-PVC-Schedule-40-Hub-Double-Wye-Fitting/3358812