Hey Luke,
Glad to hear you finally got a car. I know you've been searching for a while, and I guess I missed it on Facebook when you put the money down! When I first brought over 4494 I had to keep her outside for a while across the summer, so I bought one of the car covers from Project Vixen.
Specifically, I got the Technalon cover there. The breathable nature means it does let in some moisture, but it is overall pretty damn solid and will keep your interior dry if you have yet to patch the usual leaky places. It's by no means perfect, but it did the trick for me and continues to do so 3 years on, when the odd occasion occurs that I have to park her outside.
Figured I should chime in since I feel part-responsible for your purchase