Toilets, Sinks, Showers, Tubs and Disposals - New basement toilet install

I'm finishing my basement and have a stubbed in toilet pipe. My problem is that the pipe is in the wrong spot. I need to move it 7 inches at a 90 degree angle to the drain pipe. It is a 4 inch pipe and I've opened up the floor to get to the top of the tee in the main line.

The situation is complicated by the fact that I have in floor heat and I'm restricted by how much I can open up the floor without damaging the heating tubes. I have about 4 - 5 inches of vertical to work with.

Are there offset fittings that I can use or are there any suggestions of what I might be able to do without cutting into the main line?

Any ideas?

Thanks
dartman

If you could get me a picture, I may be able to help you out. I will be out after Tuesday for possibly a week, so if you need it soon, write back soon.