I think those rims should be quite common for MY01.
From one option code site I found (
http://industryfigure.com/berkeley/Porsche/Options/OptionsMatrix.htm ), it looks like the standard wheel is 16":
Cast Light Alloy Wheels "Boxster Design":
6J X 16 with 205/55 ZR 16 tires, Front
7J X 16 with 225/50 ZR 16 tires, Rear
Including anti-theft device
Apparently there were options for 17" and 18" (mine are 17's).
Just to confuse things, the optional 17's in the above site are Code 391, which a 2nd site (
http://www.kindel.com/Porsche/options.asp ) says is for "stone guard foil", and code 232 is for the 17's. Sheesh! I have both codes on my option list, but I don't know what the heck the stone guard foil is for. If it's for the rad inlets, there's nothing there now. If only I could have afforded a new Boxster in 01, there wouldn't be this confusion!