ZeroplanetzI've not seen a drop for 12x12 tarp at sub 16 oz, even in the ultra light community. You might be better off making your own.
Ripstop By The Roll sells a great variety of fabrics for the ultra light crowd, plus all the accessories . They also have pre cut kits- you pick the fabric and color, comes cut, with accessories, you put on webbing, tie out points etc. Just a thought.
VajtagalSorry you are kinda correct. I miss spoke. I would like a 12x10ish. I know ripstopbytheroll. My abilities are not up to par for tarp making yet lol. My best bet would be to prolly order from a cottage vender. I already own a cuben fiber tarp with doors that is around 12 x 8 and around 7-8 ounces. But I don’t want to use that one for everything like car or slight hiking camping With my hammock setup. Which is why I’m browsing around for something still light but not as crazy expensive.