the early bonnets don't look good with the late grill, it all doesn't match up.
as for the saab rims, they are available in 4 x 108 which will just fit on the 4 x 110 but is a bit dodgy. mine are earlier saab rims which are identical but are 4 x 114.3. both of these are either +35 or +40 so you need spacers. i use mine coz i have a wider diff (ke55) in the ke20 and don't want to run flares. IMHO flares only look good on ke25's, not ke20's.