One thing that may help you collect is to take advantage of the secondary market in the CN classifieds and on Astromart. There's a HUGE Nagler population among us all because they're very high performance eyepieces in modern scopes like yours and they're often available there. esd726, Kut...
'SUN VALLEY','SWAN VALLEY','TENSED','TETON','TETONIA','TROY','TWIN FALLS','UCON','VICTOR','WALLACE','WARDNER','WARM RIVER','WEIPPE','WEISER','WENDELL','WESTON','WHITE BIRD','WILDER','WINCHESTER','WORLEY