Jim,
My apology for butting in -- just caught your ref to a good friend (=angel) being willing to spring for canon. The April 2012 issue of "Civil War News," p. 18, has ad announcing deactivation of Huckstep's 1st Fluvanna Virginia Battery (reactivated/reenactment) and its entire battery for sale. Ad cites and shows photos of ammo chest, limber, a Parrott and a Napolean (cast iron tube). POC is Michael D. Moss, email ecidi[at]aol[dot]com, phone 610 253-9385. Web site www[dot]fluvanna-artillery[dot]org shows in action. "All in excellent condition and priced to sell."