BlueMist Vapor has a huge selection of juices(250+) and has some menthol juices. They have sample packs and allow you to pick your own juices for a sample pack. Their prices are really good too. And you can get extra flavor shots for .50cents more
They also have menthol drops and menthol crystals. Using them will allow you to make any
juice a menthol. Or you can give a menthol
juice a stronger menthol taste. The crystals are $1 for 1/4 ounce. They are better bc they are very consistant, but you would have to dissolve them yourself. You can disolve them in PGA or crush alittle bit up and mix into some PG. Then add to any juice. If you dont want to do that you can just buy the menthol drops. They are $3 for 6ml. Its 66% crystals dissolved in 34% ethyl alcohol.
Using either of thesewill allow you to get a wider array of juices because with these you dont necessarily have to get a menthol juice. You could get a regular juice and add alittle to give it a menthol taste. Its strong so only use a little bit if you get it. Add a drop or 2 and test. If you want more add another drop and test again. Continue doing that until your happy with the taste