Amazon offers Prime members the Zensah Calf/Shin Splint Compression Sleeve in White for $5.67 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.57.) That's the lowest total price we could find by $21. It purports to relieve shin splints and provide shin splint relief. It's available in XS/S and S/M.
Note that this price is for a single sleeve.