Hey Oz, Welcome. How old is your eldest son? I like the idea of this swap. Do you have a Zed yet as there have been a lot for sale lately! There's lots of info here so get ready to be informed
Mark
I'm sure someone here has the proper roller. There is always a risk of paint damage professional or not.
http://www.ebay.com.au/itm/Auto-Vehicle-Fender-Guard-Roller-Lip-Reforming-Rolling-Expander-Tool-/390732640115?pt=AU_Car_Parts_Accessories&hash=item5af97aef73&_uhb=1
Renewing parts are expensive. Can almost guarantee it's a seized compressor. Remove the drive belt and try turning with a spanner. I have a good compressor here if i can talk Adam out of not buying it. I think that a full setup for a 240Z would sell for $1000 any day of the week.
You must be doing this yourself. Cheap + Restoration = Fail. You save $50,000 on labour on an average resto. The time you spend chasing better prices would be better off spent working on the project.
It happens all the time that people often chime in later on who have the parts. I'm not fussed as it's all about what Adam wants, i know others will be looking for air con down the track.