I get the saline from a local drug store in 1 litre bottles. They have to order for me.
I get the syringes and catheters from a local surgical/medical supplies store so I don't actually get the from the sites I posted. It was just to give you an idea what they look like. Depending on where you are there may be stores who carry them or can order for you.
We've been using an inclined mattress and also believe in letting gravity do the work. The mattress is definitely more comfortable.