Desperately need help..Beeman Sportsman Series model 2008 (co2 pistol)

I have been looking EVERY WHERE for information on my Beeman model 2008 pellet air pistol. There seems to be absolutely NOTHING to be found anywhere about it so I'll try here.

Long story short, the seals are blown, pellgunoil does nothing. I'm quite sure I need to completely replace all the o-rings in this gun. So, if anyone can pass along maybe some teardown/reassembly instructions, I would be in your debt. Unfortunately google turns up nothing, and for some odd reason Beeman won't give me any info about the gun. I've left messages, sent emails. No response. Very odd. Makes me wonder if this particular gun was a Beeman flop, and they just don't wanna talk about it.