Huber Concepts also offers a replacement trigger. I have no first hand experience out of either, but have had a few customers who've dropped in one or the other and liked them.
Frankly, to each their own, but working on a Mosin is like trying to make a silk purse from a sow's ear. Good guns for what they are, but I never saw much sense in doing much to them. The several I've owned have all stayed stock.