CBD car parking (near Southern Cross/Flagstaff) - middle of the day

Tomorrow I need to drive into the CBD. Between Southern Cross / Flagstaff stations (Lonsdale x King/William Streets area). It will be around 10am-2pm. I've looked at Secure Parking and Wilson Parking websites but without being able to use early bird for my hours (and sometimes even with earlybird!) it's all pretty pricey. Any recommendations for a nearby carpark with reasonable rates for the middle of the day and preferably a carpark which is somewhat decent in terms of width of lanes and spots (a hard ask in the CBD)?