I'm not quite sure if this will fit what you are looking for, but my last two models are at around 150 MB zipped. The files are in jpg but are taken from the original, work done to them, and then saved out as a jpg with max quality (12 in Photoshop). Of course there is going to be some loss, but I try to minimize them. They come with a no makeup option as well. The face file for Tessen, my last one, is 9.77 MB with the actual PSD (not included) that I used to make it sitting at around 1GB (many, many layers). Dimensions are 4000x4000. Here are the links to the pages:

Tessen:
http://market.renderosity.com/mod/bcs/index.php?ViewProduct=82176

Sai:
http://market.renderosity.com/mod/bcs/index.php?ViewProduct=81761

I try to leave bringing down file sizes to the customer as I know I would rather have full or near full quality and then decrease rather than the other way around. There are also closeups of the face both in the product pages and gallery. I know you were looking for different file types, but you might not have much luck in that department (at least I've never seen them offered outside of merchant resources). Anyways, good luck in your search and hope you find what you are looking for :)

Have a wonderful day,
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