I can’t remember the size letter it makes but, my go to set is a mold by Martha Stewart that Can be found at michael’s or acmoore. Here is a link to them on eBay
http://www.ebay.com/itm/like/381127146412?lpid=82&chn=ps&ul_ref=http%253A%252F%252Frover.ebay.com%253A80%252Frover%252F1%252F711-117182-37290-0%252F2%253Fmtid%253D1588%2526kwid%253D1%2526crlp%253D53601919689_324272%2526itemid%253D381127146412%2526targetid%253D87946123329%2526rpc%253D0.18%2526rpc_upld_id%253D47990%2526rlsatarget%253D%2526device%253Dt%2526mpre%253Dhttp%25253A%25252F%25252Fwww.ebay.com%25252Fitm%25252Flike%25252F381127146412%25253Flpid%25253D82%252526chn%25253Dps%2526adtype%253Dpla%2526gclid%253DCObV9c_XlsUCFUgkgQod4kkAJQ%2526srcrot%253D711-117182-37290-0%2526rvr_id%253D821459039518