1970 Landlord impliments?

Hello all. I'm new here. I just picked up a 1970 Landlord 3410. It came with a roto tiller and mower deck. Roto works great but the mower deck is shot. I checked on pricing for rebuilding the blade towers and the parts alone are in the $200 range per tower. Anybody out here know of any sourses for stuff like this or if towers from another model will fit? I,m in NW CT. where we grow some of the nicest rocks in the country. thanks, brier