I think the package is named python-wxGTK and can be downloaded from any SUSE-mirror.
To use a SuSE mirror with Yast, follow these instructions:
Yast -> Software ->Change source of installation -> Add -> FTP
Server: ftp.suse.com (or any mirror
Directory: pub/suse/i386/9.1 (you need to adapt this path if you are using a mirror)
Install all packages the usual way (Yast -> Software -> Install and Remove Software)