While the old legions kept Fellblades, as the Astartes were the main army of sorts of the Imperium, following the Heresy, the Space Marines became sort of a more typical special forces organization, and superheavy vehicles don't quite fit that bill. That being said, the First Founding chapters most likely have a few sitting around all the same.
Space Marines rarely go to war by themselves. There are usually either accompanying Imperial Guard regiments, an Inquisitor (who may or may not have his own private army...), or PDF forces on their back foot who need the aid of the Astartes. Any way you cut it, guardsmen are probably around, and where there are guardsmen, there are tanks. Where there are tanks, there's probably a baneblade somewhere, even if it's the regimental command tank or something.