Dry film resist is commonly used in printed circuit board industry and can cover a much larger area than spin photoresist. However, thickness is needed to hold the film together so film photoresist typically comes in thickness of around 50 microns, and is applied to a planar area by hot roll lamination.
Resolution is also lower.
The following web sites, along with many other sites, explain more about dry film photoresist. Hope that helps. Please let me know where it can be purchased, and if such a product even exists.