Hello,
I am a designer and illustrator. I rarely work on T-Shirt designs, but i'm quite flexible in my illustration style and techniques, so i could do the design n any prefered manner - vector or raster, realistical or cartoony, stylized, geometrical, etc. Feel free to take a look at my portfolio here, in my freelancer profile, to see if my skills meet Your requirements.
Cheers,
Ronaldas