Ok I went to Canadian Tire (Canadia Hardware Store) and picked up some rust remover, let it sit for 1.5 hours and now it's completely cleaned. As for the "G" clip I have no choice but to go and purchase another one but this time perhaps I can coat it with some sealant to prevent it from rusting again? Will that do the trick?
As for asking Patrick, he claims he orders the part assembled and has no way of obtaining the parts individually, he then went onto say that I must be the second guy in all his purchases that had this happen to and going to any hardware store will be easy to find a replacement part, well that is far from the truth. Am I upset? Of course I am, I spend $20 after shipping for a device that that has a faulty part and now I have spent countless hours and money to get this thing back in working to avoid spending another $20 for the exact same part that can risk getting damaged again. He is in the business to make money and judging from his response he shrugs it off assuming the ratio between happy customers and unsatisfied customers isn't worth the effort to get me help.
I didn't want to rant knowing as he is a vendor here but I would strongly suggest staying away from these stainless steel carbonation caps, also the fact that he doesn't sell plastic ones angers me even more because now I am SOL from buying anything within Canada.
But I have to suffice with what I got going so unfortunately the hunt continues, here are some pictures of the device dis-assembled.
P.S After hours of googling, I contacted the manufacturer of the metal carbonation cap (I guess where Patrick buys his supply from), and the lady quoted me $0.15 cents for the clip (Thanks Patrick!). But not sure what the minimum requirements are and if I can buy a single item.
If anyone has any plastic carb caps located in Canada please let me know (Preferably ontario). As for making my own cap I would need to remove the gas lock fitting and replace it with another fitting and I'm tired of still buying and spending more money unnecessarily.
This last picture doesn't have the clip, was wondering if I could spray a seal on it?