You can do your work on a metal surface, to which you can clip your wrist strap (clip to an unpainted part of the metal, to make a good electrical contact). That will keep all parts at the same voltage, so there is no static to worry about. Anti static mats, especially the good ones from 3M, can cost you $80 or more, depending on their size. Cheaper ones are available, but don’t do as good of a job. Good luck with your repair.