Does anyone have a preferred place to source replacement parts for a Holley 1945 carb (on a '74 Valiant, if that matters)?

I've spent several hours searching around on this site and others for a good source for spare parts for a Holley 1945. I can't seem to find such a place, so maybe it doesn't exist? The car I bought has a 1945 that is missing the choke plate and choke screws, and possibly other things, but I can't seem to find a decent parts diagram nor parts list. I've read through Dan's links and several other links in the FAQs, but I'm coming up empty. I've now learned, from several links, how to adjust the carb and how to service the carb, but it still need a couple of parts before I can get to that stage. Where should I go?

What is your carburetor number, in the picture is that the parts you need

Yes, the top plate/butterfly is the part that is missing from my carb, along with the two screws that hold it to the horizontal rod.

I believe that the number of the carb is a (R?)6723 AAA 1638 or 1688.

They're ready to ship PM me your address

Thanks.
I read through the thread that you linked. It's al good info, but what am I supposed to get from it specifically?

At the bottom of that page that has your carb number. 6723 AAA in holley listing. Jet sizes model year application . Your carb is an after-market replacement for all transmissions 1974 (25) 22-R-120-621 that's the original jet number. Might be useful information in the future

I just wanted to give a HUGE "thank you" to matv91 for helping me out with this.