A couple of on-topic observations.
Aircraft which have been taken out of service have a cash value to the taxpayer and HM Treasury's rules - not MoD's - make it very hard to justify giving them away. However sympathetic MoD staff might be to the idea of preserving Sea Kings there are limits to the help they can give. Some will certainly be preserved - a yellow one is going to the RAF Museum, a Mk4 to the FAA Museum and there may be a Mk5 gate guardian at Culdrose (but keep your fingers crossed on that one). Others may well be preserved privately - all it needs is the money to buy them.
The multi-coloured Sea King previously mentioned in this thread ironically isn't actually a SAR aircraft - it's a HAS Mk6 (yes, OK, it will have had a secondary SAR role but that wasn't its primary purpose).