What would be the most expensive repair for an E-Series?

Hey guys,
reading the paper and a couple forums this morning got me thinking, what would be the most expensive thing that could go wrong with an e-series nowdays? Excluding crashes.
Like, are there many parts that are only available from Ford, that can't be substituted, and are hard to find second hand?
V8 stuff that's Falcon specific is expensive/hard to find, but you can generally substitute Mustang parts, or make generic water hoses fit easily. Apart from that, I can't think of anything overly expensive, especially when you look at other cars. Jared (I think) with his 5 Series BMW, and the 7k gearbox rebuild comes to mind, as does air con compressors on Commodores.
I guess being able to buy a complete car for $500 means parts are ultra cheap
reading the paper and a couple forums this morning got me thinking, what would be the most expensive thing that could go wrong with an e-series nowdays? Excluding crashes.
Like, are there many parts that are only available from Ford, that can't be substituted, and are hard to find second hand?
V8 stuff that's Falcon specific is expensive/hard to find, but you can generally substitute Mustang parts, or make generic water hoses fit easily. Apart from that, I can't think of anything overly expensive, especially when you look at other cars. Jared (I think) with his 5 Series BMW, and the 7k gearbox rebuild comes to mind, as does air con compressors on Commodores.
I guess being able to buy a complete car for $500 means parts are ultra cheap
