Don't waste your time and $$ trying to find something close. Call Mike Sipple at Fly High and get a custom sac made. I messed around and wasted my $$ with Launch Pads and Fly High sacs. Get what you want the first time. They are about the same price.
Spend the money and get a custom sac the first time from FH. I grabbed FH sacs here and there and by the time I was done, one custom sac would have done the trick for the same price or cheaper.