Racing Beat Europe aren’t actually part of Racing Beat. Try contacting Racing Beat directly, but you wll be paying US postage rates.
Try GoMiata.
Goodwin sells them, but they won’t ship international.
You could cobble one together from mandrel bent tube, but a better intake, for the NB, is from behind the drivers side headlight, ie a cold side intake.
You might have to extend the MAF wiring a bit
Its what Mazda did for their 2004 MPS concept car
If you want a fitted solution, there is the Autoexe intake
D-Tec, another Japanese outfit, do a similar tyoe of intake. Revlimiter does a writeup:
https://revlimiter.net/blog/2014/09/d-technique-nb-coldside-intake/
His is a US car, so perhaps the wiring is different, but its possible no actual cutting of wire is needed. So potentially you need some Samco tubing and the biggest K&N (or other).
Also note, I visited Racing Beat in 2000. Mazda asked them to to get their intake ready for the NB, and to be compatable with the factory brace on NBs. Racing Beat had to develop a custom brace bracket .
There are a ton of DIY write ups for cold side intakes, such as this:
