Hi, I have a 20 gauge single shot H&R youth model Topper Jr. with a 22 inch barrel. I want to take it to do some "Skeet & Trap" shooting. However, the shortest barrel allowed is 23 inches. Can I buy a longer barrel (24 - 26 inches) for the H&R Topper Jr.? Will the longer barrel from an adult size H&R or New England shotgun fit? Is it best to order from a firearm dealer or is their a site dedicated to H&R and New England Firearms? The model number is 098 Thanks.