I am Not sure they are needed except for SSP restorations.
At the time, it was listed as a selling point upgrade to justify the SSP price and look better than a Camaro etc. in the run offs. It was not needed.The only reason Ford offered a silicone set is because there was customer demand because other manufacturers standard hoses didn't last. Ford's stock hoses lasted just fine.
(Looking at Rock Auto for brands,) Goodyear and Gates, good, Dayco is OK, Continental should be good if it is the same as they tire company, but who knows for sure, AC Delco is blasphemy but are generally good parts, and Motorcraft should be a good part from someone else they put their sticker on. Anything less is for emergency use only, including the flex hose.Goodyear hi miler hoses are decent hoses as well, I have a set in storage
The ford racing radiator hose kit are made of high temperature silicone. They were originally used on SSP Police mustangs. They have been discontinued and the only place that carries the 6 piece set is Performance Parts Inc, but they are $429.99 a set.