From some lowdown throw-down poking back in April, the current plaques would need a redesign to accommodate – they currently hold three lines of stuff and character count matters; the size of the plaque (because there are two) also factors.
The next obstacle in line will be the backers listed in more than one season 13 episode. Someone’s bound to request that listings from seasons 11 and 12 make it in (seems outside the scope of the wall, which thanks the backers that built the Gizmoplex) and, again, some are listed in multiple episodes.
S’pose adding an additional field of text, small typeface, that references episodes by number would be one way to quickly add 'em to the existing plaques without too much hassle. It might pose an interesting puzzle to future Gizmoplex visitors, too (“what in tarnation are all these crag blasted numbers all o’er the place?!”). Another might be a !dressy, simple pop-up dialog that gets rastered to one side of the plaque (although I can see issues arising when someone gets rollover crazy with their mouse).
