I've been trying to get my hands on some D&H magazines in 7.62x39 for my Ar. The problem is I live in California and I've only found 1 site with the 10 round capacity. Anyone know where I can possibly get a 10/30, stripped mag, or other site that has the 10 round other then Brownells?

If you're not absolutely stuck on D&H, 44mag.com has ASC 7.62X39 mags in 5 and 10 round. Worth a thought if you can't find D&H.

If you get anyone's 10 round .223 mag, you'll probably be able to get around 6 or 7x 7.62x39mm rounds in it.

I had no luck with asc, I've also tried c products and mwg.

I tried to modify a few .223 mags and yeah get about 5 rounds before they start to bind.

North River Distributors 7.62 x 39 AR Magazines

5 and 10 round C-Products 7.62x39 magazines.  I just ordered a couple 10 rounders from them a few weeks back for range use.  No issues with the order, and reasonably prompt shipping.

What problems are you having? I'm thinking there has got to be a problem with your gun if none of those mags work for you. I use 5 and 30 round CPD mags and I can shoot all day with zero problems in several 7.62x39 ARs. If you've only tried one CPD mag maybe you happened to get a bad one, try ordering a current production mag.
I also wanted to get the elusive D&H mag when it first came out, but I have heard almost all bad reviews of them. I think that's why they didn't catch on and so few dealers carry them.