Here's a
thread that may be of use to you. I've never rebuilt an engine before (and I'm still not done with this one), but the thread chronicles what I've done with it so far and may answer some of your questions. You can acquire the proper cam and timing gear from
3tech since you don't actually have an XFi motor. Get a tranny from a 1.3l swift if you can, but you'd have to swap the whole thing. An XFi tranny would do too, but will be equally difficult to find. I got my rebuild parts from both partsdinosaur and JIS.
Good luck and welcome!