I have taken it to a trophy engraver in Derby, he has been really helpfull discussing options, sorting out the lettering fonts and what he can fit on the available space. he reccomended a light scribing as the slides are not that thick and quoted £30 to £40 max to have her name on one side and "2nd anniversary" on the other.
The lower frame is a WE1911 knighthawk custom and the grips I got her as a christmas present from SPDgrips in the US, think they where about £35 plus postage. the grips fit after a little sanding around the holes for the screws.
just hoping the engaving turns out ok otherwise will be an expensive piece of junk