Funny lettuce

I made lettuces today- and boy is it hard! First I started with a cane and FAIL! So then I started rolling the clay so the colors would blend in..............somewhat got the color, but not the texture is the problem. Does anyone know the perfect tool for lettuce texture? I used aluminum foil ( I know, I know, so stupid). This is a custom order, and it's not like I can give up now :( my client has been really excited about this and I can't let her down now!! OK enough for today.
P.S. the oysters are made of polymer clay :)