I think Miruko does these in batch mode and certain calibers at a time. I would wait it out. On the other hand if it has to be a certain barrel and caliber the online suggestion maybe the best way.

I did a quick catalog check and I see the 30-06 Hunter with a one piece scope base included is listed for 2021. Nice, hi grade wood. Wait for it. Maybe a local FFL can get on a back order for you.

Now, I am a little confused. The catalog shows the 220 swift in bold and 12 more calibers in grey print. That might merit a phone call to see what is actually planned in the next 12 months.