is your car RHD? ifso, I'm not sure where you can get a line that you need. if you were in the states I'd help you fab something up...
You can try the hychill crap but I'd rather see you convert. if you convert to 134a you'll need to change the TXV in the evaporator box, as they are specific to the kind of refrigerant in the system. You'll also need to drain/ flush and change the oil in the compressor to the proper oil.