'66 dart parts?

1966 dodge dart, 170 I6, three speed on the column. This is my daily driver. And finding parts is crazy it seems, seriously, CAN'T EVEN GET A SPARE KEY MADE!

Any ideas? Mainly I need a gas cap, Florida rain / hurricane season is here, I was hoping to pick one up locally so I didn't have to wait, but at this point the internet maybe my only choice. Autozone, advanced auto parts, napa, all don't have one. I would really prefer new or used in great shape, this is my DD but would like new or using in great shape when replacing parts as I plan on having it mostly to fully restored in 5-10 years, one part at a time basically.

Also, I think the ignition switch is newer, because my key don't lock or unlock the doors, any simple, cost efficient suggestion? As it stands I can't lock my doors because I couldn't get back in if I did!... Note the ignition switch shure looks original!

And last but not least, I will wed a new clutch soon, basically as soon as I get the cash, any suggestions for parts for this also? Can't spend much, but I wanna make sure I get something worth getting as well, I'm assuming I will get the whole kit so I'm guessing between $150-$200 for the whole thing? Doing the work myself.