has anyone tried AZ Electronic Materials photoresists? I found their website with some genereal information about some different products they offer, mainly to industry for commercial production of PCBs and semiconductor devices I think. not sure whether they are available through any US distributors in smaller quantities but I would think probably they can be found somewhere...
http://www.az-em.com/en/Products/Litho-technology/Photoresists.aspxRobert