Check out Jerry aka JLEMOND on the isuzupup.com site.
He's in the Hot'lanta area but I'm not sure which part.
He's retired from Isuzu where he trained dealership techs for factory certification.
He is knowledgeable to the Nth degree and has been known to have obsolete parts (if you're real nice)
He's a very nice guy & a HUGE info source on specs, etc.
Also, try searching both here & the P'up site before asking Q's that've been answered 200 times to avoid getting flamed as a Noob.
AND, Welcome!
Good to have more Southerners around!