Yanmar 1GM Throttle Cable Replacement

[twomikes]

I need to replace the throttle cable from my pedestal to the Yanmar 1GM and have done a fair amount of reading on this site and figure I have enough information to get started.
One thing I want to fix is how the throttle lever operates. Currently idle is when the throttle is fully forward, and then to increase RPM the lever is pulled back towards the operator. This is backwards to any other boat and it makes sense to change it, but how? I just purchased this boat and it baffles me that it has been operating this way for over 28 yrs.
There must be some sort of linkage available to attach to the engine to reverse the directional throw. I don't really have the mechanical expertise to fabricate something and willing to purchase whatever is required.
Here are a couple of pics looking down into the pedestal with the throttle lever in the full forward/idle position, and a schematic of the throttle cable on the Yanmar 1GM.