Check out http://e-liquid-recipes.com
I'm sure you'll find something there. The only caution I would give, and I LOVE "mint" vapes, but I found Wintergreen and Spearmint to be 2 very overpowering flavors when you DIY. A little, I mean a VERY little goes quite a long way. I can't imagine vaping either of those "alone".
I usually vape the E-Liq cube yummy gummy it has an awesome taste you can try this bottle I bought it from csvape.com they also have the cosmic fog cola gummy ..I should try this !