tamron 17-35 f2.8-4 would be a very good bet... if lucky they appear in BnS at about $350.
at 17mm its consider as an ultra wide already for a FF.
alternative would be 17-40, but that would cost close to 1k
+1 for the Tokina 19 - 35mm f/3.5-4.5,
Its well worth the price you pay for.
It is built like a tank and the optics produces more than decent picture quality. Definitely good enough to be use on the Eos 88.
The only down side I can think of being its a wee bit noisy during focusing.