You're always welcome!

The [Merlin Vacuum][1] is a variant designed for the vacuum of space. It has a far larger exhaust and nozzle than the sea-level Merlin Engine, as the expanding gas is not compressed by the atmosphere at higher altitudes.

According to SpaceX, the Merlin Vacuum uses LOX/RP-1 propellent, generates 981kN of thrust and "operates with the greatest efficiency ever for an American-made hydrocarbon rocket engine" when running at full power.

I'm not sure who worked on the design of the Merlin Vacuum specifically, though I know that [Tom Mueller][2] has led engineering at SpaceX since the company was founded.

Elon Musk has stated that the cost of a Merlin Engine is less than one million dollars (which is relatively inexpensive). I can not find specific information regarding the vacuum variant though.

I'm sorry, but I wasn't precisely sure what you meant when you asked about the Merlin Vacuum suppliers??

Here is [a link to a list of upcoming SpaceX missions][3]. That page contains the information you requested, and is updated regularly. Would you like me to summarize the mission schedule for you?

[1]: https://www.spacex.com/vehicles/falcon-heavy
[2]: https://en.wikipedia.org/wiki/Tom_Mueller
[3]: https://www.spacexnow.com/upcoming.php
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