12gram CO2 adapter for Steyr LP-5

Azuaro,
I was hoping some machining genius would have figured out how to make a few and sell them. I agree with you the project is not $$$ justifiable. 
I happened upon a like new LP-5 and have a 5 lb CO2 cylinder to charge it at home. When we move to Arizona for the winter months it would have been very convenient to have the capability of using the 12 g CO2 cartridges. In all probability I will not drag that 5 lb tanke with me to AZ.
i toyed with the conversion of the LP-5 to air but the cost dissuaded me from proceeding I that direction. The Steyr factory wanted ca 200 euro but they would not accept shipment from an individual and the US importer quoted $900 for the conversion which made it economically impractical. At the 200 to 300 euro level I would have proceeded with the conversion to air.