I had a Custom made Aeroquip Teflon Stainless Braid hose made for my engine 10 years ago. The one I have is a PMA part rated at 3,000 PSI. I could have got one for $4 less that was only 1,500 PSI rated. 10 years go, the hose cost $54 and they made it while I waited. I took them a mock up that was the length I wanted.
At the time, I could purchase both the Rigid Stainless or the Teflon Braided hose with firesleave from Lycoming at a much higher price. I had a custom made rigid stainless line that was made for me by a friend. I when with the Teflon hose and gave the Rigid line to another RV builder and he is flying with it.
After 1,953 hours of flying over 9 years, the 3,000 PSI rated Aeroquip Teflon hose is still working.