The Megan coilovers are the same thing as the A'PEXi N1 Ex-V coilovers. The Ex-V are the entry level A'PEXi coilover. They're made by some company in like Taiwan or something and are also sold as another brand in Australia. There's a longass thread about it over on miata.net:
http://forum.miata.net/vb/showthread.php?t=164611