I recently posted the same question. There are actually many options in current production. Ortofon made a high compliance cartridge, the 540 MkII, that is still available off of EBay (and I went with it). Apparently the 540 was among Ortofon's top MMs until they replaced it with the 2M Black. Soundsmith offers essentially all of their cartridges in a high compliance cartridges version. Benz makes some that are not exactly high compliance, but have compliances within the range that will work with the SME3009.
New-prod high-compliance carts for SME 3009
I acquired some Shure V15s which is a cart that makes you forget about cartridges. But after almost a year there's a bit of an urge to play. I've discovered that carts that are really appropriate for an arm like this are not commonplace and most recommended are no longer available. Are there any new-prod (prefer MM) carts that are suitable?