Does anyone know of a source - resource for a standard USA quick detach sling stud that works on the mounting thread hole for the fore-end / forearm for a Saiga S-12 IZ-109 recent production. Ideally I would like two lengths, one that would hold a synthetic fore-end (of varying thicknesses (adjustable via shims)) in place and one that would leave the fore-end naked / removed (shorter) I want to attach heavy duty Uncle Mike's quick detachable sling swivels. The little pigmy sized swivels that come on the shotgun are ridiculous, especially when you consider you are now working with a shot