Heres the link
https://www.gunbroker.com/item/882478842

And the description
I have too many projects and this one must go. I bought it earlier this year. Just about everything you need to build your own 8 bore English double, it consists of a pair of twist steel 31" barrels marked W. Ellis with Birmingham proof marks. They were separated and de-rusted by someone else. No ribs but a short section of lower rib remains. Marked "9" but left bore measures .830" at the muzzle and the right is .850" making this an 8 bore. Bores are far from perfect but I would shoot this with light loads. Flash holes clear with intact 1/4-28 threads for the nipples. Massive 3" thick stock blank. Side locks are newish with a tiny maker's mark I can't read in the crook of each mainspring. A pair of new, undrilled hammer castings/forgings, left and right. Triggers, trigger guard, buttplate, fore end key and another piece I guess is the floor/pivot for the triggers. I was told by a member of the British Militaria Forum that William Ellis was in business in Birmingham at 45/46 Whittall St. The father from 1822-1840. Wife or widow Anne from 1841-1850. Son William from 1851-1868. Ellis was later bought by Webley & Scott but shotguns with the Ellis name continued to be produced until the turn of the century. Judging from the proof marks I'm guessing these barrels were made late 1860's at the earliest. I'm asking $1000 shipped