Trailduster big block NP435 clutch fork woes

I am working on converting my 440 powered Trailduster to a 4 speed NP435 and now have FOUR clutch forks none of which seems correct. I have one that I thought was correct and seems correct but putting it all together it seems a tad too short. It barely engages the bearing doesn't look right, and if I were to put the adjuster rod in it would be at an angle towards the trans since it seems too short. I assume the adjuster rod should be close to straight. The one I have is about 12.75" overall length and about 12" from the center of the adjuster hole to the fingertips. As far as I can tell I need one that is maybe about 1/2-1" longer so around 12.5-13" from center to fingertips and over 13" long end to end and I need the slot style not the ball style... It is the last piece I need to fire up my Trailduster pretty much....

Where would I get the correct one? Or does anyone have one of these that they could measure for me so I can confirm I am not losing my mind?