Well done, is this your first milsurp or just your first Mosin?
If you check out surplusrifle.com there is a tutorial for shimming the trigger in order to make it lighter. But yours might already be fine.
As far as surplus X54 goes, the only place in Canada I know of that sells it online is Districorp.ca, and possibly marstar.ca, I'm sure there are more that someone else can point you to.