I don't know of a compact t-bar with angle markers on it. But I do like the AKG KM235 for full-size SDCs. It's inexpensive, flexible, compact. And I find it isn't all that hard to eyeball ORTF after doing it a few times. You may need a small riser to make ORTF possible with full-size SDCs (or run one mic above, the other below, the bar).