Since you have shimano bar ends and a shimano RD, stick with shimano for the FD if for no other reason than at least having all the same company.

Deore models, assuming good shape, are always a good option, though some versions wont fit the look of the RD as Deore FDs usually have a piece of black plastic on the front, so they aren't all metal.

shimano triple front derailleur | eBay - have at it!