Off-market office building prospecting for an active client
I have a motivated client looking to find an 8,000-13,000sqft class b office building in Los Angeles. There is basically no active inventory that fits his target area and needs. Does anyone have advice for prospecting? I have about 50 potential properties that fit his criteria. The cold calling is not working out, emails are scarce, and I'm running out of options. 

*Long shot - any local LA brokers know of anything, please message me.* 

Will provide more info as needed. Thanks.
[{"id": "ffdxhcr", "text": "Do you have access to a large email database through constant contact or something similar? CREXi has a way to do it. I'd do a \"buyer need\" email blast. I've had success cold calling for situations like this though.", "replies": [{"id": "ffdxi5a", "text": "Also I'm in Texas if that matters.", "replies": [], "depth": 2}, {"id": "ffdxue9", "text": "&gt; CREXi\n\nI don't have a large email database but that's a good idea to create something. Thank you, I'll work on that.", "replies": [{"id": "fff7wjq", "text": "Reach out to them and they can probably charge you for one blast to their database.", "replies": [], "depth": 3}], "depth": 2}], "depth": 1}, {"id": "ffdxkgo", "text": "For investment or owner-user?", "replies": [{"id": "ffdxlqf", "text": "This is for owner-user.", "replies": [], "depth": 2}], "depth": 1}, {"id": "ffe161t", "text": "If you want to partner up with us, we can help.", "replies": [], "depth": 1}, {"id": "ffiq7y4", "text": "Leverage assessor data... Use the county tax data in conjunction with sales for the last 30 years within that sq ft range in the area. This will allow you to target possible investments that have been depreciated or at least the current owners may not be receiving the \"best bang for their buck\" tax wise that is maybe you'll find one that's on the market for a 1031 and didn't know it. If you don't have an analyst or arent great with analyrics you could also pay for Reonomy which would do a lot of the analyst work for you.", "replies": [], "depth": 1}]