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Apocthulhu anyone?

Try on Yog-Sothoth.com. Oscar Rios there is under @Golgoroth name.

The Ezoterrorist from Pelgrane Press got some cool ideas about stationary campaign. Worth to check them out!

Well Delta Green Countdown is and Delta Green Impossible Landscapes will be You go to material. In Tales of the Crescent City by Golden Goblin Press is chapter about KiY and one of the most prolific and enjoyable adventures of all time Have You Seen The Yellow Sign and a sequel of some sort.

Mythos Expeditions for Trial of Cthulhu got something also set in Yukatan or even in Mexico City IIRC.

Mysteries of Mesoamerica from Pagan Publishing.

There was some adventure from Ben Burns and New Comet Games, do not remember what was the name... But it was something like second part of The Hounting. As I recall @John Hook published another version of something happening after this adventure. Also cannot remember the title, but John is dweller here, so it is possible to ask him about that...

Superb material. Cannot wait for more!

As for now the last info about this project is from Miskatonic University Podcast interview with Chris Spivey from couple of months ago...

I think that some home scenes we can import to Call of Cthulhu like staying on the case. Some are more akin to Delta Green. But in the end we will do what ever suits Our tastes and Our group needs. Don't we?

For a down time activities Delta Green has a great mechanics. Maybe You could borrow something from that book?

Yes it is and there are stand alone adventures for Rura Tonga. I've even started the preppin for little Pulp Cthulhu Campaign, You can see what I've already done on my blog here, under Heroes of Rura Tonga label. I will run this sometime next year. Sorry for shamless plug! The autor of Rura Tonga has another superb book - Pulp Egypt. Cannot highly recommend it.

Heroes of Rura Tonga is Your Tales of Golden Monkey go to rulebook!

You should check definitly Astounding Adventures also. This is Pulp rulebook for BRP without Mythos flavor. But with 3 good adventures and and adventure generator!

You've got some good examples of NPCs in the Pulp Cthulhu rulebook. Not from old pulps, maybe it is a matter of copyrights?