Lamar Odom Wants to Get Back with Khloe Kardashian, No Beef with Tristan

Lamar Odom's thirsty comment on Khloe Kardashian's bikini pic on Instagram wasn't a shot at her baby daddy, Tristan Thompson ... it was LO shooting his shot with his ex-wife. Sources close to Lamar tell TMZ ... he wants to rekindle what he once had…