I to replaced my portable butane stove with a Coleman; I was lucky enough to find one in the local second hand shop for $30... however, I have now spent nearly 3x on bits and pieces to go with it...
Storage bag from the local saddlery ($50):
And a decent fuel bottle:
I like the Trangia bottles over a lot of the others as they are really easy to control to flow out of with the spring loaded self closing top and small spouts, compared to many of the other options which don't auto shut off... just not a cheap option...