Any mid racquet will do
ie:
Dunlop 100s (90sqinches 16x19)
Head Prestige Mids (16x19 if you can get your hands on them, 18x20)
Are listed @ 93 sqinches but are said to be close to 90)
Wilson Six One Tours (16x19 90 sqinches)
Wilson Blade Tours (high SW though, 18x20)