Honestly, it's not like you need specific gaming miniatures. Or that the miniatures (even the Shadowrun ones) will look like the particular characters in your game anyway. You can use anything to mark the position of the players: other games' miniatures, chess pieces, spare dice, coins, cardboard scraps, paper clips, random odds and ends... whatever's handy.
Initials written in appropriate markers.
Fixed that for you. Most battle-mats are wet-erase, and a dry erase marker may leave a permanent mark on them.
Yeah, that's why I don't like battle mats.
For Shadowrun, my group doesn't use a map.
That's interesting. Shadowrun was the first time I ever introduced detailed tactical maps to my group. We've never gone back. It suits SR very well, for some reason.