Lots of good advice in here. although, I must say that I think you are assuming a lot here. Your build is not a clutch killing monster by any means. Unfortunately... i would recommend a stock 210mm clutch kit and flywheel as was mentioned before. Also, TDC is TDC. No mistaking that one.
If missing the whole valve cover then I believe the casting is the same between the 1.6 and 1.9 so you could drill holes and use the 1.6 cover, which is more common.