Is there any place where I can download the official quick build cards that have been released so far?

I don't know about a place to download official ones, perhaps the wiki maintained by @Wazat . I know @J1mBob created an amazing tool that puts upgrades on pilot cards so you can print them out. There is a pre-populated list with the quickbuilds.

You can’t print the official ones. They have PDFs of the conversion kit content quick builds but it’s more of a list.

Only place I know of for the official new ship ones are in the boxes they come with. Or, go to the link above me enjoy the unofficial ones with all the info on them.