How do I purchase a music track license without a subscription?

I've edited an adobe music track preview into a video and am now trying to instruct my client on the purchasing process.

They do not wish to enter into a subscription but purchase the standard rights as a one off payment. I beleive this can be done using a credit pack but after repeated phone calls and chat sessions with adobe, I still cannot work out how the process works.

When I go to the music track on the Adobe stock webpage and hit the shopping cart icon all I get are two options to either join a monthly or yearly subscription, there seems to be no option to buy the track as a one off purchase or use any prepaid credits. Do you need to purchase credits for the option to become available?

Even if I could work out how to do it, I can't seem to find any indication of how many credits a standard music license requires. It seems like a very strange way of selling anything?!

Can anyone help explain the process please?

Any help would be great.

Thanks Paul