I bought the FS-2500 from Filtration Solutions and liked it. However, since There seems to be a lot of new FS-2500s on ebay without hoses, the factory is reluctant to sell hose sets if they don't have the buyer on record. I misplaced my hose set and they actually did a lookup to see if I had bought it directly from them.
As mentioned, its easy enough to make your own SS braided hoses. There seems to be a lot of new FS-2500 bypass setups (whole or partial) on ebay right now. This was a $425 setup from the factory 12 years ago when I bought mine.
When you check out the ebay reference, the other listings come up.