My sister bought a used road bike from Backroads and does not like the curved bars. She wants to change over to flat bars. The rear derailleur is a Deore and the front is 105. What model shifters and brake levers does she need? Her LBS wants to charge $500 to make the change with parts. That sounds about $200 to high to me. Any advise? I was hoping to pick up some used parts online to cut the cost.