What is the cheapest aero bar that accepts bar end shifters?

I would recommend the Profile-Design Sonic Stryke bars. It of course is full carbon and has integrated cable routers and a computer mount. They retail for $260, but I got mine at PerformanceBike for $80 (they now have a 20%) discount sale for all products if you're a member. They were on closeout at $100 (hence my $80 price) at the time.

Good luck with your search.

Forte T2 from performance.