Quality E12-to-E26 socket adapter?

[AlFrugal]

My dining area has pendant lighting fixtures with E12 (candelabra) sockets. CFL bulbs are installed in those fixtures. I would like to replace the CFL bulbs with LED bulbs. There is a far wider selection of E26 (standard base) LED bulbs than E12 LED bulbs. I've searched the web for E12-to-E26 socket adapters. The ones I've found on sites like Amazon get many negative customer reviews. Any suggestions on where I can find a good quality E12-to-E26 socket adapter?

 

[nickbits]

I bought the cardboard looking ones off amazon, they work fine. The solely plastic ones on there I had issues with the screw not being long enough.

Bad:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Good:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

The biggest issue with these is there being enough room in the light fixture for the larger bulb, since it will be significantly longer. I bought some adapters that had a flex shaft to fix that problem in a smaller light, but I don't remember where I got them from... I think ebay.