Dan Thompson is endorsed by Weber - Please check out their page follow this link - https://webermandolins.com/mandolin-artists/danny-thompson-of-kyle-jarvis-and-iiird-generation?fbclid=IwAR1zGe2JRYP1HFgtN5Uxep1EQPi1IsnsTNCYCsv0_GA5vfQ6uEx93fMfwcE
Stuart Banjos - Contact Shawn Harper if your interested in checking one out!!
KJ3G - Is sponsored by Black Diamond Strings Please visit their website at https://blackdiamondstrings.com/