Depending on where you are and what your resources are ...
1. Block print - lino-cut? - for yourself on fabric from furnishing fabric shop or the local market - or old sheets
2. Print from your own digital file onto fabric with your bubble-jet printer if it will do it - some do, these days.
3. Take your design to a tee-shirt printing place and they will do it pretty cheaply. They may use a silk screen as in (4) or a printer as in (2)
4. Make up your own silk screen and do it yourself.
Doing it yourself, especially with friends, will be cheapest and most fun - and your can dedicate the merit of the making as well