it would be best to take whole herbs. i use the local market for mine. there are good places on the web. i am sure MH would sell some as well. as for dandelions, they are coming out soon and free for the taking if you can find a clean spot to pick them. they are best unwashed, dried at room temp and hand ground, not with an electric machine. the rest are easily obtainable. i use the capsule machine in 00 size and vegcap my own custom mix of herbs and glycos. they are simply part of my food intake.
if you insist on a tincture, one can be easily made with vodka or grain alcohol.
if you like this kind of stuff, MH may still have the book used in the dr christophers school of natural healing. thats what i have. it has all that info in there. it is the basic textbook for the master herbalist degree.