、。
You don't find a cool guy like that often.
Literal
Like-that cool [attr-な] man, often [topic-は] don't-exist.
A quiet, almost wistful observation. カッコいい ('cool, stylish, attractive') is the casual form of 格好いい. そうはいない is the そう ('often') + は (topic/emphatic) + いない ('don't exist') pattern, adding slightly more contemplative weight than そうそういない. The implicit verdict is admiring rather than dismissive — 'guys like that just don't come along often.'