Yes all Sirion use same front discs, even the 1.0 and 1.3sl Sirion, no difference until the mk2 Sirion 2005+

I have brand new Sirion discs and pads on ebay as well!

D-sport are grooved. From experience grooved or drilled discs are no better than plain. In fact worse as you can often get braking noise and when heavily worn more vibration

If you want your Rally to stop with no fuss, Fit the Ferodo DS2500 sport pad.

Which is what the Rally's originally had fitted when brand new.

There was a set on ebay the other day that went very cheap, retail is over £100!