[...] device that can control the actuator forward and reverse with one channel of my receiver either pot/switchable channel.
Since you have no use for speed control whatsoever for this, you can use 2 automotive relays (one for each direction) and a single proportional channel arranged so that moving the stick (or whatever) one way will make it go forward and v.v.
You'll need a microcontroller to interpret the servo signal from the receiver, so that pulses below eg. 1.25ms triggers one relay and pulses above eg. 1.75 ms activates the other.
If you need to slow the actuator down a bit a simple PWM (with a 555 and a power transistor) can be put inline with the supply.
I did purchase a double switch from DE http://www.dimensionengineering.com/DoubleSwitch.htm in hopes I could control it via relays but did not read it all the way through before making the purchase.
Bad description. Took me a while to see that it's just a single
DPDT relay. Had it been a true dual relay unit (as it appears to be advertised), it would have worked.
edit** I am moreso looking for a DIY than an off the shelf product.
How are you with programming a microcontroller then?