Transmission dipstick and oil cap needed

Where can I get a transmission dipstick? My dipshit brother broke mine off. The tube is fine, I just need a stick.

I lost my oil cap as well. I have a 73 Dart Sport with a 318 and Mopar Performance valve covers. I tried the Mr. Gasket version they had locally but it doesn't fit tight at all. Where can I get one that fits? I tried the Mopar Performance catalog and they don't list them.