I'm not up on my different types of running t-shirts, although I own a couple.
Is a 'technical' T one that is snug fitting anyway?
I get mine from the Sweatshop and they are loose fitting on my belly. In fact, the one's I buy are not the snug body hugging kind at all.
Perhaps you should just go to a specialist shop and try a few on until you find one that you feel comfortable running in.
And remember, NOBODY is looking at your belly. If anything, non-runners are looking at you with envy.