I just got the Tushy 3.0 Spa bidet attachment. The warm water tube they include isn't long enough to really reach my sink comfortably. I know they say it's 9' but it looks/feels (and I even measured w/ help to find that it's more like) 7' in length and I need more like 10'-15' to navigate around the L-shape of my bathroom from behind the toilet over to the sink.

Their website has a 15' listed, but it's out of stock.

This leaves me with two questions:

1) Does anyone know how quickly "out of stock" items on the official Tushy website are replenished?

2) Is there an alternative site or option I can get from a local hardware store (like a Lowes, Home Depot or Harbor Freight type of place) to either extend the existing tube or replace it with a longer one?

I just don't know what to search for in specific terms of whatever it is. 15' polyurethane hose generally brings me results of air tubes and things with fittings that don't look compatible with the bidet. Any guidance along these lines is greatly appreciated.