I was able to find them for backorder on mouser. First parts should be shipping my way on 3/1.
LC79DAEK is the dev board. Mouser only ordered 2 of them? I bought one, and it’s shipping to me on 3/1. https://www.mouser.com/ProductDetail/277-LC79DAEK/
LC79DAMD is the module. They won’t ship out until 3/26 and mouser ordered 249 of them. https://www.mouser.com/ProductDetail/277-LC79DAMD/
Interestingly, I just noticed you’re using LC89 series and I stumbled on LC79 series. I’ve not yet figured out exactly what the difference is. Wish they had a little comparison chart somewhere.
L89 Spec sheet: https://www.mouser.com/datasheet/2/1052/Quectel_L89_GNSS_Specification_V1_1-1829989.pdf
LC79D Spec sheet: https://www.quectel.com/UploadFile/Product/Quectel_LC79D_GNSS_Specification_V1.1.pdf
79d is physically smaller, uses less power and has greater accuracy (<1.2m vs <1.8m). I think it’s the better part, but it’s hard to tell. Formatting between the two spec sheets is slightly different making comparison hard to do. Not n–p hard, but still hard.
ST and Ublox both make a dual band chip, but the ublox boards are ~200.00, ST boards are ~400 while the Quectel models are ~20.00 (50 for dev kit).