just go to the dry cleaner for alterations. Unless you have priced them and they really are out of budget, this is what we used for DH and it worked out great every time. And I think it cost us $4/shirt for the alteration?
You could always aim for a bigger waist.
Sandbag Training For MMA & Combat Sports
Sandbag Training Guide on Kindle
The Complete Guide To Sandbag Training
Brute Force Sandbags
http://fitedia.com/ - Health and Fitness eBooks, video, audio and workshops
Find your size that fits you perfectly and there are loads of online retailers that will sell you a tailored shirt for a fair price.
2010 - 5,11 and 101KG
2012 - 5,11 and 77KG
Train hard, eat well and love life