I am in need of large quantities of zentai suits for dance and video projects so I searched for the shop yesterday.
And found this shop which responded my message. (many shop do not respond maybe due to the lasting Chinese New year)
Their suits have sawing in front of the face from the nose to the chin which is not a perfect suits but they have sizes from XS.
When I purchased suits from Zentai.cn previously, their size S felt little big for me. For the suits that are not custom made, it is better to purchase one size smaller for the perfect fit. Zentai.cn has no sawing in front of the face and the suits is in good condition. But they have round sawing on top of the head which look like Kappa, a Japanese mythological character that lives in the river.
The perfect sawing is the one that has one line on top of the head, which you see in Marcy Anarchy's photographs. But lately spandexforfun.com in bangkok is making suits in this style. They do custom made but I don't know if their quality is acceptable if you order online. When I order the suits from the outlet of the shop in Bangkok, I wear two times and ask for adjustments. The glove is little big and not really fitting I feel but it has got a lot to do with the materials that they get in thailand.
Japanese lycra and Japanese sawing do the best match. I hear the chaccot in Shinsaibashi, Osaka does one of the best job but I also read that there are few style of zentai sawing they offer one is 'Fujimura' style which I have no idea.
Reffering from this site, Lycra was first invented in USA by DuPond and later made joint venture with Torey where the history of zentai emerged. But I have not yet to find which particular technology that Torey and DuPond offered that expand the possibility of stretchy 2way or 4 way lycra material.