Where to buy

Hello everybody I am wondering where I should purchase a DMF kit from for my 2009 vw Jetta sportwagen. It’s a 6 speed manual paired up to a CBEA. I am planing on getting a timing belt kit too but I would prefer to get it from the same source. I heard that idi parts is good but I just need a second opinion. Anything help!

On a side note I was wondering if I should upgrade my cooling system and since the car will be pretty torn up. Any tips on what I should upgrade as far as oil cooliner,radiator, transmission cooler, etc.