I'm aware of the brands listed below, anyone know of others?
Toda Racing http://www.todaracingusa.com/catalog/pc/viewCategories.asp?idCategory=92
SR Motorsports http://www.srmotorsports.com/srmiataEngine.html
Flyin' Miata http://www.flyinmiata.com/index.php?deptid=&parentid=&stocknumber=04-66400
Maruha Motors http://www.maruhamotors.co.jp/miata/parts/camgear.html
Fidanza http://www.gomiata.com/fiadcamge.html
Boundary http://boundaryengineering.com/drupal/node/35
OBX Racing http://www.obxracingsports.com/products.php?pk=1517
Toda Racing http://www.todaracingusa.com/catalog/pc/viewCategories.asp?idCategory=92
SR Motorsports http://www.srmotorsports.com/srmiataEngine.html
Flyin' Miata http://www.flyinmiata.com/index.php?deptid=&parentid=&stocknumber=04-66400
Maruha Motors http://www.maruhamotors.co.jp/miata/parts/camgear.html
Fidanza http://www.gomiata.com/fiadcamge.html
Boundary http://boundaryengineering.com/drupal/node/35
OBX Racing http://www.obxracingsports.com/products.php?pk=1517