BT'er with Screenprinter connections

I do a lot of work - and race - to bring the need for organ donation to the forefront.  Currently, I spend my own money to have t-shirts made and distribute them to organ recipients and donor families so that they become a part of "my team" and are with me for races - even if they can't be there personally.  We have found that being a member of a team provides people that are awaiting transplant or have just received one the ability to find strength in numbers by being a team member.  I have currently given away almost 50 t-shirts.

I spend my own money for these shirts and i have never charged anyone for a shirt.  The problem is that it is getting quite expensive for me to continue on, but I have a problem with telling people no.  Nobody told me no wjhen I was waiting for my transplant or after I received it. 

What I am looking for is a screenprinter that is willing to cut me a deal to make this a more realistic project for me.  I would like to talk to anyone that can hook me up with a screenprinter that they think can do me this favor.  Unfortunately, I am not an officially recognized charity at this point (no tax number for write-offs) so I don't have a way for them to get "credit" for it - I am working on that step.

Thanks for reading.