Rell, Jean-Paul Ridon, a former PH, has been building bolt action rifles on military M98 systems for years, see his website https://www.jp-ridon.com ; I cannot comment on his products as I do not know anybody within my network that uses them. I was not aware that he had previously built double-rifles and this really comes to me as a surprise as I have never heard on the French market of JP Ridon doubles.
Louis