I think I got my last lot from GSF, and im very happy with the performance of them (no fade issues, and respond well when they get warm). I dont know who to reccomend tho, as im sure the quality will vary between manufacturers, and you want good brake parts! So it may not be advisable to buy the cheapest available if the brand has little or no reputation. GSF, Euro Car Parts, and VW spares are perhaps the usual suspects to check, maybe even good old e-bay too.