Are you sure it was Belgian? I personally think Tripels are the best beers in the world, and I don't recall ever seeing one with cherries or cherry juice. Of course there are so many Belgian beers maybe there is one, but I haven't drank it, just the usual suspects, Karmeliet, Westmalle, and perhaps my favorite Val-Dieu.
Regarding "Belgian Quadrupels", I'm not sure there is such a thing. There are quads, but they are not Belgian. I think the term quad started in Holland.
But, +1 to Ommegang. Their Hennepin is the first non-Belgian "Belgian style" that I ever enjoyed, and it took a damn long time to find one. Over here, it is a very high value IMO, because it's like maybe 85% as good as some of my fav Belgians, but at less than half of the cost. (Usually about $2.50ish a bottle.) I know a super beer nerd that also prefers the Abbey Ale, but having bought a number of both, give me the Hennepin every time.
I have plans to start brewing my first beers later this year, and I don't even know if it's in the realm of possibilities for me, but if it was remotely possibly to do a bottle fermented tripel, I'd feel like I was an alchemist who succeeded in turning lead into gold! (After all, the going rate for most all of the brands is about $6 for a bottle of less than 11.2 oz or whatever it is.)