Ahhhhh I love it whenever this topic about alternate mini's for Lahmians comes up.... we may lose out a bit with the rules we have to deal with, with being Lahmians (ie. no armour save, bloodline powers that are nixed by immune to psych), but we make up for it with the great fluff we have, as well as the possibilities available in terms of mini's to represent our characters. The GW ones are not bad, and I have a couple painted up for those GW mini's only tournaments, but there are much better choices out there.
For example, this one
can work just as well as your beautiful Lahmian vampire, or if you choose to like this one
has, it can be perfect as a female necromancer that still captures that Lahmian beauty.
I definitely like the Spyglass one that someone had linked earlier, the one that was with the Grave Guard unit. The next one, which can be seen here
, has some potential as well I think.
I really like this one
. I think the hairstyle looks very Egyptian which works well with the Lahmian theme I think.. yes, a Brettonian look and theme works well for Lahmians as well (I will be painting up some Brettonian damsels myself for replacement necro's for the GW tournaments), but if you want to go with a theme where your Lady is quite ancient, then the Egyptian look works quite well.
All these are from the Reaper line. I currently use two Reaper mini's for my necro's, but will have to check out their site and see if I can find which mini's exactly they are.