here is everything you need to build up a 1.6L..... decent pricing.... they don't have an english version.... but Altavista can translate from German to English
Pick the 1.6/1.8/2.0 OHC Sunbird & LeMans.... most of the parts are for the 8V but things like clutches and flywheels fit.... so do crankshafts, pistons, connecting rods since these are all bottom end parts......
....Like I said.... there are lots more... but most of them are more orientated towards the 2.0L turbo engine... I would concentrate on Mantapart.... they seem to have a reasonably decent reputation with the Lemans, Sunbird, Cavalier, Grand Am crowd.
I doubt that Mantapart has any idea that the Lemans 1.6L and 2.0L is alive and well in a 16V version.... if one were to point that out and ask them to get you parts.... they might be inclined to have parts manufacturered or stock parts brought in from Europe UK......
.....Oh.... I forgot about these guys.... althought I've never talked to them (because I forgot about them ) it sounds like they bring in Opel parts from the UK/Europe http://www.vinteq-opel-parts.com/ ......
.....As an update..... I just emailed Mantapart to explain the situation with the Opel 16V engines being very close cousins to the Lemans/Sunbird 1.6L/2.0L 8V engines.
Hopefully they will show interest and I will keep you guys posted in regards to what they have to say. "
for those new to the site, precisionboost is very creditable in the information he supplies