Jellybean, you seem to be a bit confused!
Thai is Thai and Bali is Bali, you either have Thai spacers or you have Bali spacers. Thai spacers are made in Thailand, Bali spacers are made in Bali Indonesia - two different countries, two different styles, two different methods for working metals.
Having cleared that up, if they are sterling or fine silver, as most spacers marketed as Thai or Bali are, they don't contain lead. If they are base metal, they are more than likely imitations made in China or eslewhere and might or might not contain lead depending on the base metal used. It's usually a good rule of thumb to avoid lead-based metals for use in fabbricating jewery.
Hope that clears up some of the confusion for you!