SILVERS Circus’s decades-long presence in Mornington is facing an uncertain future as its current home at the Bata shoe factory site prepares for development.The site at the corner of Nepean Hwy and Oakbank Rd, known as the gateway to Mornington, has hosted the circus for the past 30 years, but this summer will officially be its last as it begins a desperate search for a new home, which the circus hoped would remain in Mornington.“Unfortunately, that site is now being developed so we need another home for us,” Simon Tait, representing Silvers Circus, told The News. “We’ve become almost like…