I could give you a recipe where you could make your own... and I am not a very good DIY guy... it's just easy....
anyway... I have been doing the menthol thing for 4 years... and tried many...
For the money, I am quite a fan of goodejuice's ice cold menthol... and that's all it is... just a nice clean base with good performance - very cool and satisfying... and strong...
You can also venture over to GEJ's Lab Juice side and they have 2-3 menthol juices very similar to Halo's... similar quality and price... but just enough different to make you feel good about trying it - I liked Emerald Square... the milder of the lot.
My New Favorite....
I like this one even more than my own...
It's from a NEW Company named ATONEMINT...
Mystical Menthol
It is just right with a smooth, hard kick...
the CLEANEST - base of the all...
http://atonemint.com/Home/index.html