Airgun repair in Southern California

I am looking for suggestions for Airgun repair locations in or around Southern California. I have used Mac1 in the past, but they are not returning my calls or emails. I have a Career 707 that has developed a leak and will no longer hold air. Should be a simple fix for a qualified repair person. Thanks in advance for any referrals. I'm in Ventura county now, so anything nearby would be appreciated, but I'm willing to drive a bit for the right place.