Hi all,
My G40 exhaust snapped off at the box bit (sorry, not very technical). I took a chance and got this one from eBay until I get a LongLife one or something.
http://cgi.ebay.co.uk/Exhaust-Rear-Silencer-VW-Polo-Coupe-1-3i-G40-1990-1994_W0QQitemZ190284294263QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item190284294263&_trksid=p3286.c0.m14&_trkparms=72%3A1683|66%3A2|65%3A12|39%3A1|240%3A1318
It comes from Germany ... didn't take too long (about a week) and it's actually pretty good! Not knocks/rattles and not bad to fit.
Obviously I don't know how long it lasts but for that price I'm recommend it as a short term alternative.
Gemma