Exploded Cast Iron Radiators -- Cost of Remedy?

[Mark Beekman]

I'm analyzing my next rehab, but one big, unfamiliar issue I have comes in the form of 7 exploded cast iron radiators. Some are upstairs, some are downstairs, but all of them have huge chunks blown out of them (presumably from freezing). I'm looking to replace them with radiators of similar style and era (1920/1930s).

Is this going to be a crazy expensive fix? I have no idea how much to factor in for rehab costs because of this. Any advice?