The only thing I can think about is getting them 2nd hand off ebay but you'll lose the warranty and considering the number of delamination cases out there, I wouldn't think of it as a wise decision.
An odd argument this one.
Most of the posts I've read on the matter seem to say/imply that the limbs that delaminated (various reports, various limbs) were new/nearly new. In the UK under the Sale of Goods Act If the fault happens within six months of you buying the goods, the trader has to prove that they were not faulty when you bought them. After six months, you have to prove it.
If goods are faulty, the seller must offer you either:
Free repair, not much use for limbs
Replacement
Credit note. Obviously you would only accept a credit note if you want to buy a replacement in the same shop - you don't have to take it.
You don't have to accept any of these - you can insist on getting your money back of course.
Presuming most of the "delaminated" limbs were bought from shops to where they were returned for a refund/replacement everyone's happy.
On the other hand, usually the G3's on Ebay are used, possibly for a year or maybe more, looking at the ones currently on Ebay.com that seems to be the case. By my logic therefore, if they haven't fallen to bits during the time the original owner had them they are probably a good buy!