Authorities in California on Wednesday were searching for Britney Spears’ ex-husband, Jason Alexander, who failed to show up for a court appearance. Alexander was slated to appear in a Napa County courtroom on Tuesday, where he was set to face two felony counts for grand theft auto and buying/receiving stolen property. A court clerk confirmed to TMZ that 40-year-old Alexander was a no-show, prompting police to issue a warrant for his arrest. The charges against Alexander stem from an incident in 2015, when a woman accused him of stealing some of her expensive jewelry, including a $2,000 bracel…