Alternatives to Lantus?

I started a NEW THREAD
https://forum.tudiabetes.org/topics/2014-assistance-programs-to-help-afford-insulin-diabetic-supplies
FOR INFORMATION ON FINANCIAL, patient assistance programs etc.
in hopes that this thread will focus ONLY on concrete MEDICAL advice, suggestions, experience, etc. regarding switching from Lantus to another (cheaper) insulin type.
Thanks!

PLEASE POST ONLY MEDICAL ADVICE HERE (not financial):
Since I only have a couple of days of Lantus insulin left, and do not have the $185 or a prescription refill required to get another bottle I'm hoping others can help me to either switch to NPH (cheaper and no prescription required) or switch to Humalog only which I have plenty of right now -(I've tired about 4 times over past year and failed at keeping BS normal + stable on Humalog only). Failed (Humalog only) for reasons I could never figure out why...

My current insulin regimen (Lantus + Humalog) listed in my prior post.