The problem with any answers you will solicit, Bob Segal - Is that if I told you Yellow Tops, there are probably 100's of places you could buy those from. Just like all the others. I'm a little private in nature and respect 3rd party disclosure laws when it comes to certain things but you may be able to PM someone and find specifics above just "what kind". And in lieu of board rules, ie; not posting lab names etc, you may have to PM to obtain that info.