Osprey (I saw one yesterday), get Vaughn Whisker, Sr. and James Biser Whisker's book "Gunsmiths of Bedford, Somerset and Fulton Counties". You can probably get it through an interlibrary loan. I have it and it shows a lot of Bedford flintlocks. P. 51: Henry Albright restocked by John Amos (looks like Thomas Oldham's work to me). P. 73 and 76, James Clark, P. 75, Sheets and Clark. P. 101, 103, 104, 105, 107, 108 and 109, Joseph Mills. P. 131, 133, 135, Jaacob Stoudenour. P. 139 Benjamin Franklin Troutman, P. 141, 142, Daniel B. Troutman. P. 145, Issac Wendle. P. 147, John Whetstone and P. 149, and P. 150,Peter White, these last three don't look like Bedfords.
See also James B. Whisker and Lary W. Yantz,"Gunsmiths of Bedford, Fulton, Huntingdon, & Somerset Counties". Flintlock on cover. P. 49, John Amos. P.66, James Clark. P. 91, Levi Fondersmith. P. 102, 103 (not Bedford style) Andrew Kopp. P.121 and on cover, 122 (2), 124, 125, 126 (2), Joseph Mills. P. 133, Nicolas Shenefelt. P. 157 Stoudenour. P, 171, Daniel B. Troutman.
See also Calvin Hetrick's "The Bedford County Rifle and Its Makers". P. 4, and 38, Peter White. P. 37, Joseph Mills. And "Kentucky Rifles and Pistols, 1750-1850". Page 33, Jacob Ruslig. P.34, Peter White and John White.
I have never heard of a swamped barrel Bedford. They are slim with long barrels, usually of small caliber. I built a Thomas Oldham .40 caplock with a 42" barrel and like the Bedford style for shooting.