I don't have a 320 x 200 version of it; sorry.
I've also just squashed what must be one of the more obscure Quake bugs. I have no recollection of ever seeing any references to it anywhere, ever. The server sends a blank centerstring to the client in some places (e.g. the Nailgun room in E1M1), so the fix is as simple as adding a check for
if (!str) return;to the start of SCR_CenterPrint.