I am in occupied Kalifornia for another year.  What is the best 10 round magazine for a ZPAP M70?

Magpul mags work fine. They're not as durable as surplus mags but if you're not beating on them they're fine.

Are these Kali legal? https://atlanticfirearms.com/russian-spine-stamp-10-30-ak47-magazine-ukrainian-rearsenaled

They are Cali legal.  I ended up just getting a couple 10 round PMAGs.  When I escape this communist hellhole in 6 months, I will get real mags.

Glad the OP found a solution.
Not in a ban state but sometimes I use short 10 round mags, a mix of Croat & modified Chine 5s.
The Croats are a bit nicer than Korean mags. But the Chinese 5s are as well built as surplus steel mags.
I think Apex has or had a follower with shorter legs for 10 rounds capacity. I just cut the follower down.
These 5s used to be almost giveaway, never paid more than $7 for one. Now, prices are like everything else, way too high for what it is.
But the BEST short 10 round mag...

Get a Chinese 5 rd mag and cut 1 inch off the bottom of the follower and it will hold 10 rounds.