Datum: 22. August 2018 22:48
A bit late to the party but I'm thinking of fitting one of these as a complete replacement to the existing heater and blower. I think it's small enough to fit and plumb to the existing vents so everything looks standard.
A bit expensive but perhaps some of the costs will be recovered selling off the existing fan and matrix.
Still needs a belt driven pump and radiator in the engine bay but they are the easier challenges.
There's also a air-con only version a bit cheaper:
I've no connection to the company but have used them for other stuff.