Water fitting connection

Dreame comes with G3/8 T-connector with a 1/4" tubing attached to one side of it. My plan was to attach it to sink line, but sink connectors are 3/8 compression. Spent couple of days trying to find an adapter, no luck. Of course i can go to npt first then to g3/8, its just seems more potential leak points and like $50 just to hook up water line.
Could someone recommend a place or site where i can find 3/8 comp to g3/8 adapter?
Thanks!