Seeking Infinity 481 Large Nasal Cushion

I am looking for an Fisher & Paykel Infinity 481 Nasal Cushion in size Large. I am also interested in the entire headgear if it is in reasonable shape.
Either new or used cushion is ok as long as it is intact/not ripped. Unfortunately, I don't have any of these to trade in return so I'm expecting to buy.

Mine recently ripped.

TIA
Bill