Sid had one on his zvh engine , doesn't look like it had the lower half of the cvh inlet as it sits very low in his engine bay , could be a custom made one.
Saying a ported inlet will be as good as a well fabricated one or the jenvey inlet is just not correct. Ford is designed as a mass produced engineered part and not a high end Motorsport part that can handle these sorts of figures people are chasing etc .
Gus has the correct idea in terms of tuning yes my parts are good enough for 400 bhp @30psi but if I uprate certain parts on my build I may be able to get 400 bhp @25/27psi making a more reliable engine all round , now not everyone can afford the parts or not everyone wants to spend on the parts but this silly sigma around oh we can use shitty cvh original parts ported is just silly compared to proper engineered parts designed to do the job better.

Lots of people can make them , choice is yours really

Cheers paul