I feel your pain brother!
I've been looking to get one used as well, but not a hell of a lot of luck.
Check with your local pro shop. That's what I did. I was told the SL-68II is still being made, BUT it can take more than a month for it to come in.

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Setup: PMI Piranha GTI, 9oz Co2 Tank, PMI X_RAY goggles, 200rnd PMI loader, PMI Twin pouch harness, two 100rnd PMI pods and a Swyper flexible squeegee.

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