I have a GM factory replacement (tube and dispstick) -- I purchased it from ebay for my LSA forged rebuild.
This is the dipstick only part number (price is about $20-$25):
12669528
Its a factory replacement for the twisted version -- works like a champ!
Images are from the SS forum but, I bought the tube and dipstick
GM has 'phased out' the twisted version, this is the replacement...
If you order the 'old' part number, you'll get this one instead I'd wager...
this is mine:
-Don