Since the donor car had a front end accident, two hoses were required to be built; straight hose between condensers and right condenser to drier filter. The rubber element of these hoses was ruptured but luckily the pipes were intact. So, upon showing the hoses to the A/C shop it was very easy for them to create new ones.

A few words about refrigerant hoses: Hoses designed for use with R12 are incompatible with R134a since the molecule of R134a is "smaller" than that of R12 so there is a tendency for R134a to "escape" from the rubber hose. However, old R12 hoses which have been used for quite some time don't show from this issue since oil layer of protection has been created in the internal surface of the hose. This natural barrier formed, prohibits the permeation of R134a molecule to escape to theatmosphere.

New hoses created were R134a spec.

2020 Update: It seems that R134a refrigearnt slowly leaks out of the R12 hoses despite the oil layer. The leak is about half quantity of the total volume inside the system (about 300 gr leak in a peroiod of 3 years) therefore new hoses R134a spec have been created.