Very challenging request - the Liberty has not been made in, what, 25 or 30 years - could fit the unit with a re-purposed Gaggia boiler - someone with some mechanical prowess could probably pull this off.
Your original boiler (Steel or Aluminum) has rusted through or is leaking?
Thanks for the reply and suggestions Colin.
Check out the picture attached. The inside is pretty ugly.
As you can see there is a small hole in the back of the boiler and unfortunately the wall around the hole is really thin.