Can't find correct length rear shocks

[Ezzz]

Hey guys, got a 69 C10 with a coil rear end dropped 4/6. I'm running the hotchkis springs which have a pretty light spring rate in the rear. Rear shocks were at a pretty nasty angle so did lakeroadsters rear upper shock relocater which I'm happy with angle wise. I've attached his link so you can see what I'm working with and in case it helps anyone else out. Easy, well thought out, and works. Thanks lakeroadster

http://67-72chevytrucks.com/vboard/s...d.php?t=451200

Now it's time to find some new shocks since the old ones are seized (probably from the angle they were run at) and the incorrect length. I've looked up how to measure and I get 9" compressed, 13" static, and damn near 18" with the wheel just barely touching the ground extended. The po did some funky stuff but don't think he did a long travel rear end. Nonetheless I'm having some trouble finding a shock that meets those lengths or anything close.

The truck was lowered 7.5 out back so I notched it. I figure I can limit the downward travel with a bigger bumpstop but the notch was a pia and I'd hate for it to be for nothing. And while I don't plan on necessarily jumping the truck, I do want to beat on it, and don't know if using the shock as a suspension limiter is the best idea.

I've been looking through manf. pdfs at lengths and I'm lost. I know I'm not gunna find a shock that's 9" compressed with a 9" stroke but if you guys can point me in the right direction it'd be greatly appreciated.