Instead of wasting money on some uprated aftermarket clutch for the DMF, stick a 240mm solid flywheel on there and run an OE S4 clutch.
Probably cost less, and will get rid of the probably knackered DMF too.
you might be cheaper but only if you are very lucky.
S4 clutches are anywhere from £220-300 depedning who you go to
personally I think a 240mm flywheel and s4 clutch is overkill for a car putting out little more than a stock S4 and nowhere near the low rev torque delivery of the V6, where the clutch is really needed. (although Siena's 1.8t 240mm SMFWs are the dogs danglies!).
removing the DMF can produce some extra noise from the transmission when in neutral and idle...but as you are probably going to uprate your exhaust and stereo you won't notice!
At the moment I run a stage 3 Southbend on a dual mass (180tqs few mods- less than 200bhp though). clutch pressure at pedal is stock. It is good for over 300ft/lbs of torque and new they are around $400 (£250). I could slip the audi clutch on spirited hill starts...not any more.
"stage 4" is the next step up at 400+ftlbs for around $540.
These are not some aftermarket specials made in China on the cheap, SB buy in Sachs clutch housings and friction plate chassis and build them up to their own spec with uprated pressure plates and friction materials.
They also do a stock diameter steel ($369) aluminium ($429) single mass flywheel and OEM dual mass flywheels ($590).
even with taxes they work out cheaper than most kits here.
I am biased but I bought three myself before I became a distributor.
happy to have a chat if you want to know more.
BTW who was it on here who was looking for a 1.8t quattro gearbox?