Thanks Alk8944 for the reply. The problem is that I am in New Zealand & cannot order from Brownells (or any other major supplier) and will be purchasing off ebay.
So, I need to know actual length - if anyone can break out their ruler, I'd be really appreciative.
The extractor rod total length is 2.118". From the tip to the collar shoulder is 1.520". (note length may vary slightly) You should be able to trim the existing center pin to fit.