My 1980s Panasonic came with top mount downtube friction shifters for six speed. I'll be upgrading this bike to as much RX100 as I can get my hands on (thought about older dura ace, too specialized). I've got the rear wheel with rx100 freehub, rx100 rd ready to go.
I started looking around for top mount downtube shifters, 7 speed indexing, and I can find almost nothing. Looking at the velobase archives, I see Shimano manufactured top mount models for SL-1051 (105) and SL-6400 (600 -- see links). I'd love to find either of those.
Can anyone help with this search? Recommendations, advice welcome. Please tell me I'm not stuck with Suntour Symmetric.