You can get indexed 9 Speed dura ace downtube shifters new - but there not cheap (£45ish)
Shimano indexed 8 speed ones are £21 new on ribble - Not many 8 speed indexed ones crop up second hand, i was looking for some for a while but didn't have much luck.
an 8 speed set up would probably be cheaper to get bits for
You can get indexed 9 Speed dura ace downtube shifters new - but there not cheap (£45ish)
Shimano indexed 8 speed ones are £21 new on ribble - Not many 8 speed indexed ones crop up second hand, i was looking for some for a while but didn't have much luck.
an 8 speed set up would probably be cheaper to get bits for