I didn't find much in that size with those kind of parts specifically, either. Closest I found was a 1/4".
You may look instead at a normal crimp ring terminal if you don't find any of the "washer with solder lug" style.https://www.mcmaster.com/#standard-electrical-wire-terminals/=16jg5j1
Actually I did find something on this manufactuers site, but I haven't looked past for anybody that caries such a thing:https://www.seastrom-mfg.com/productresults.aspx?pl=solder+lugs&pc=solder+lugs+1&qs=5411&sp=wb_getallproductdetailsbylinecatpnp
Edit2: Looks like maybe you can buy directly from them. May be worth looking at.