If you make the shirts then you are the vendor manufacture. Are you looking for retailers or distributors. This question is very limited. No on here knows what your designs look like and who they would appeal to for you to send out. This is also one of the hardest types of the different types of the appareal business to be in. What is your marketing plan so far?i am new to this forum and i was wondering if any one can help me with details on how to produce my designs i have for my t shirts and what vendors to go to . please i would appreciate it .