A replacement hose can be fabricated by any industrial hydrolic hose supply company in about fifteen minutes. We have a local place called House of hose who can fabricate almost any type of hose - water, hydrolic, flexible exhaust, just t name a few examples. The prices are right and they fabricate the hose while you wait - usually ten to fifteen minutes. I have never paid over $60.00 for a hose with connectors for my back hoe.
If you are being quoted much higher either someone does not know what they are doing or are taking you for a "smuck ride". :)
Oh, and yes I did have them build be a replacement HWH high pressure hose about ten years ago for my previous coach. Has never been touched since. :)