aerial amp/splitter that will send DC power up the RF cable like a Sky box?

We've switched from Sky to Humax Freesat boxes recently.

I used RF1 to feed Freeview to the main TV & RF2 to the other 3 TVs in
the house. This also provided DC power to an amplifier/splitter
upstairs.

The Humax has only one RF out and doesn't provide DC.

Thus I currently have the old Sky+ box providing that function which is
a waste of electricity as well as space and is an unwelcome generator of
heat in this weather.

Is there an amplifier/splitter that could do what the Sky box does or
are there ways of decreasing the power use of the Sky box? (I guess
disconnecting the hard drive would be a start.

Thanks for any suggestions/ideas.

--
Simon

12) The Second Rule of Expectations
An EXPECTATION is a Premeditated resentment.

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