I know precise;ly what you mean mate.
But I don't think it's a bad idea to spar a feew Thai fighters. I myself spar quite a few mma guys and if anything it really helps me as they are predominantly big hitters (if slightly slower and less technical)

It certainly benefits them by sparring a boxer, so perhaps suggest that to a couple of them.
One of my best mates ius a Southpaw, what can I say, come every competition, I nearly prefer to see Southpaws coming now!