Thanks Shrew (& Roger) and you're both right.
I had my A/C unit recharged with R-22- what a difference -- and totally worth it in the July temps.
As for the galley fridge, unfortunately the Norcold DE 0051 is un-service-able by design (self contained and sealed, cannot be recharged).
The replacement for this unit is Norcold 751BB and I ordered one on eBay for $1500 CAD all-in (probs about $1200 in real money - $US). Also look at NovaKool if you need one, they may be slightly cheaper and they publish a conversion chart to figure out which unit to use whether you're replacing Norcold, Waeco or Vitrofrigo (Italian - I tried to get them to respond w/ Cdn distributor info, but no luck - our US cousins will probably fare better in that regard, our market is too small for anyone to have interest).
Novakool replacement / conversion tables:
Just FYI if you're replacing your galley or cockpit fridge.