I have a FSA from a Synapse as well, I think the logos are white/silver/black so pretty universal.
Let me check in my boxes, but if I have it it is brand new in plastic. Never sat inside a frame.
Let me know if that has any interest.

---

_______________________________________________________
"...Rocketbrother for being fast responses, shipping fast, delivering high quality packaging and products. A pleasure..."
"...rocketbrother is an extremely reliable seller and very knowledgable".
"Bottom line, if he posts something, buy it! A+ seller by a long way..."

Probably an SL-K? Def interested — PM me spec and price? I may wait a couple of days to see what else is out there, but there may not be much.

It's a SL-K alright. From a Synapse Hi-Mod ultegra disc. Still in plastic wrapping with reflector mounted. Never inserted in the frame.
SL in silver, K in white.
25.4x350 mm length

If you provide an email address I can send photos.
Looks like MSRP is about $95, so I'd expect about half plus shipping.

I have an alloy post as well but it's altogether different in terms of weight and compliance. I'll ask $25 for that.

---

_______________________________________________________
"...Rocketbrother for being fast responses, shipping fast, delivering high quality packaging and products. A pleasure..."
"...rocketbrother is an extremely reliable seller and very knowledgable".
"Bottom line, if he posts something, buy it! A+ seller by a long way..."

Btw if you decide on any of mine please let me know Monday latest. I’ll need to get to the post office as I’m travelling Wednesday and won’t be back for a while.

---

_______________________________________________________
"...Rocketbrother for being fast responses, shipping fast, delivering high quality packaging and products. A pleasure..."
"...rocketbrother is an extremely reliable seller and very knowledgable".
"Bottom line, if he posts something, buy it! A+ seller by a long way..."