I didn't know there was an endorsement for the ILLW, but I did get to work some.
K1L - Block Island North Light - IOTA NA-031 ILLW No. US0200
VE9SLH - Swallowtail Keepers Society
T47LH - Faro de Colón, Punta Maternillos, Sabinal KeyT44IJ - Lighthouse of Carapachibey - ILLW No. CU0013
If there are more details you need let me know. Is there a digital endorsement? I think I would like that more than the printed mailed one. =)