I agree with Wendy it's tough to find good quality. I've been breeding yellow labs in my 220 and happen to have a variety of sizes of yellow labs. My breeding group produce some beautiful fry, but I have noticed that some of the fry won't be as pretty as other fry. I would say if I have 30 fry 20 of them will be bright yellow(No nasty black vertical bars), and have distinict black fins anal and dorsal(true yellow labs), however I get 10 that don't get the distinict black fins. I may bring some to auction in January, or if you want to come check my stock out I would sell or trade. I really can't sex them and if I know I have a proven female, doubtful i'll get rid of her. I would sell or trade a dozen or so to you and you would have to hope for the best.
-Steve